Exhibit 1.1

10,725,000 Shares

McLeodUSA Incorporated

Common Stock

($0.01 Par Value)

EQUITY UNDERWRITING AGREEMENT

[ ], 2007

Deutsche Bank Securities Inc. (“DBSI”)

Jefferies & Company, Inc.

As Representatives of the

Several Underwriters

c/o Deutsche Bank Securities Inc.

60 Wall Street, 4^th Floor

New York, New York 10005

Ladies and Gentlemen:

McLeodUSA Incorporated, a Delaware corporation (the “Company”), and certain stockholders of the Company (the “Selling Shareholders”) propose to sell to the several underwriters (the “Underwriters”) named in Schedule I hereto for whom you are acting as representatives (the “Representatives”) an aggregate of 10,725,000 shares (the “Firm Shares”) of the Company’s common stock, $0.01 par value (the “Common Stock”), of which 7,150,000 shares will be sold by the Company and 3,575,000 shares will be sold by the Selling Shareholders. The respective amounts of the Firm Shares to be so purchased by the several Underwriters are set forth opposite their names in Schedule I hereto, and the respective amounts to be sold by the Selling Shareholders are set forth opposite their names in Schedule II hereto. The Company and the Selling Shareholders are sometimes referred to herein collectively as the “Sellers.” The Selling Shareholders also propose to sell, at the Underwriters’ option, an aggregate of up to 1,608,750 additional shares of Common Stock (the “Option Shares”) as set forth below.

As the Representatives, you have advised the Company and the Selling Shareholders (a) that you are authorized to enter into this Agreement on behalf of the several Underwriters, and (b) that the several Underwriters are willing, acting severally and not jointly, to purchase the numbers of Firm Shares set forth opposite their respective names in Schedule I hereto, plus their pro rata portion of the Option Shares if you elect to exercise the over-allotment option in whole or in part for the accounts of the several Underwriters. The Firm Shares and the Option Shares (to the extent the aforementioned option is exercised) are herein collectively called the “Shares.”

In consideration of the mutual agreements contained herein and of the interests of the parties in the transactions contemplated hereby, the parties hereto agree as follows:

1. REPRESENTATIONS AND WARRANTIES OF THE COMPANY AND THE SELLING SHAREHOLDERS.

(a) The Company represents and warrants to each of the Underwriters as follows:

(i) A registration statement on Form S-1 (File No. 333-141586) with respect to the Shares has been prepared by the Company in conformity in all material respects with the requirements of the Securities Act of 1933, as amended (the “Act”), and the rules and regulations (the “Rules and Regulations”) of the Securities and Exchange Commission (the “Commission”) thereunder and has been filed with the Commission. Copies of such registration statement, including any amendments thereto, the preliminary prospectuses (meeting in all material respects, at the time of filing thereof, the requirements of the Rules and Regulations) contained therein and the exhibits and financial statements thereto, as finally amended and revised, have heretofore been delivered by the Company to you. Such registration statement, together with any registration statement filed by the Company pursuant to Rule 462(b) under the Act, is herein referred to as the “Registration Statement,” which shall be deemed to include all information omitted therefrom in reliance upon Rule 430A under the Act and contained in the Prospectus referred to below, has become effective under the Act and no post-effective amendment to the Registration Statement has been filed as of the date of this Agreement. “Prospectus” means the form of prospectus first filed with the Commission pursuant to and within the time limits described in Rule 424(b) under the Act. Each preliminary prospectus included in the Registration Statement prior to the time it becomes effective is herein referred to as a “Preliminary Prospectus.” Any reference herein to the Registration Statement, any Preliminary Prospectus or to the Prospectus or to any amendment or supplement to any of the foregoing documents shall be deemed to refer to and include any supplements or amendments thereto, filed with the Commission after the date of filing of the Prospectus under Rule 424(b) under the Act, and prior to the termination of the offering of the Shares by the Underwriters.

(ii) As of the Applicable Time (as defined below) and as of the Closing Date (as hereinafter defined) or the Option Closing Date (as hereinafter defined), as the case may be, neither (i) the General Use Free Writing Prospectus(es) (as defined below) issued at or prior to the Applicable Time, the Statutory Prospectus (as defined below) and the information included on Schedule IV hereto, all considered together (collectively, the “General Disclosure Package”), nor (ii) any individual Limited Use Free Writing Prospectus (as defined below), when considered together with the General Disclosure Package, included or will include any untrue statement of a material fact or omitted or will omit to state a material fact necessary in order to make the statements therein, in the light of the circumstances under which they were made, not misleading provided, however, that the Company makes no representations or warranties as to information contained in or omitted from such Statutory Prospectus or any Issuer Free Writing Prospectus, in reliance upon, and in conformity with, written information furnished to the Company by or on behalf of any Underwriter through the Representatives, specifically for use therein, it being understood and agreed that the only such information is that described in Section 13 herein. Other

than each Preliminary Prospectus and the Prospectus, any document not constituting a prospectus pursuant to Section 2(a)(10)(a) of the Act or Rule 134 under the Act, and the documents listed on Schedule V hereto and other written communications, in each case, that have been disclosed to the Representatives, the Company has not issued an Issuer Free Writing Prospectus on or prior to the date hereof. As used in this subsection and elsewhere in this Agreement:

“Applicable Time” means [a/p]m (New York time) on the date of this Agreement or such other time as agreed to by the Company and the Representatives.

“Statutory Prospectus” as of any time means the Preliminary Prospectus relating to the Shares that is included in the Registration Statement immediately prior to that time.

“Issuer Free Writing Prospectus” means any “issuer free writing prospectus,” as defined in Rule 433 under the Act, relating to the Shares in the form filed or required to be filed with the Commission or, if not required to be filed, in the form retained in the Company’s records pursuant to Rule 433(g) under the Act.

“General Use Free Writing Prospectus” means any Issuer Free Writing Prospectus that is intended for general distribution to prospective investors and is identified on Schedule V to this Agreement.

“Limited Use Free Writing Prospectus” means any Issuer Free Writing Prospectus that is not a General Use Free Writing Prospectus.

(iii) Each Issuer Free Writing Prospectus, if any, as of its issue date and at all subsequent times through the completion of the public offer and sale of the Shares or until any earlier date that the Company notifies the Representatives as described in the next sentence, will not include any information that conflicts or will conflict with the information contained in the Registration Statement. If at any time following issuance of an Issuer Free Writing Prospectus there occurs an event or development as a result of which such Issuer Free Writing Prospectus conflicts with the information contained in the Registration Statement or contains any untrue statement of a material fact or omits to state a material fact necessary in order to make the statements therein, in the light of the circumstances under which they were made, not misleading, (A) the Company will promptly notify the Representatives and (B) the Company will promptly amend or supplement such Issuer Free Writing Prospectus to eliminate or correct such conflict, untrue statement or omission. The foregoing two sentences do not apply to statements in or omissions from any Issuer Free Writing Prospectus made in reliance upon and in conformity with written information furnished to the Company by or on behalf of any Underwriter through the Representatives specifically for use therein, it being understood and agreed that the only such information furnished by any Underwriter consists of the information described as such in Section 13 hereof.

(iv) The Company has been duly organized and is validly existing as a corporation in good standing under the laws of the State of Delaware, with corporate power and authority to own or lease its properties and conduct its business as described in the Registration Statement, the General Disclosure Package and the Prospectus. Each of the subsidiaries of the Company as listed

in Exhibit 21 to the Registration Statement (collectively, the “Subsidiaries”) has been duly organized and is validly existing as a corporation in good standing under the laws of the jurisdiction of its incorporation, with corporate power and authority to own or lease its properties and conduct its business as described in the Registration Statement, the General Disclosure Package and the Prospectus. The Company does not own or control, directly or indirectly, any corporation association or other entity other than the Subsidiaries. The Company and each of the Subsidiaries are duly qualified to transact business in all jurisdictions in which the conduct of their business requires such qualification, except where the failure to be so qualified would not, individually or in the aggregate, be reasonably expected to have a material adverse effect on the earnings, business, management, properties, assets, operations, condition (financial or otherwise) or prospects of the Company and the Subsidiaries taken as a whole (a “Material Adverse Effect”). The outstanding shares of capital stock of each of the Subsidiaries have been duly authorized and validly issued, are fully paid and non-assessable and are owned by the Company or another Subsidiary free and clear of all liens, encumbrances and equities and claims; and no options, warrants or other rights to purchase, agreements or other obligations to issue or other rights to convert any obligations into shares of capital stock or ownership interests in the Subsidiaries are outstanding.

(v) The outstanding shares of Common Stock, including all Shares to be sold by the Selling Shareholders, have been duly authorized and validly issued and are fully paid and non-assessable; the Shares to be issued and sold by the Company have been duly authorized and when issued and paid for as contemplated herein will be validly issued, fully paid and non-assessable; and no preemptive rights of stockholders exist with respect to any of the Shares or the issue and sale thereof. Except as described in the Registration Statement, the General Disclosure Package and the Prospectus, neither the filing of the Registration Statement nor the offering or sale of the Shares as contemplated by this Agreement gives rise to any rights, other than those which have been waived or satisfied, for or relating to the registration of any shares of Common Stock.

(vi) The information set forth under the subheading “Actual” under the caption “Capitalization” in the Registration Statement and the Prospectus is true and correct. All of the Shares conform in all material respects to the description thereof contained in the Registration Statement, the General Disclosure Package and the Prospectus. The form of certificates for the Shares conforms to the corporate law of the jurisdiction of the Company’s incorporation and to any requirements of the Company’s organizational documents. Subsequent to the respective dates as of which information is given in the Registration Statement, the General Disclosure Package and the Prospectus, except for the issuance of shares of Common Stock upon the exercise of outstanding options under employee stock option plans described in the Registration Statement, the General Disclosure Package and the Prospectus, the grant of options to purchase shares of Common Stock under such plans and except as otherwise specifically stated therein or in this Agreement, the Company has not: (i) issued any securities or incurred any long-term liability or obligation, direct or contingent, for borrowed money; or (ii) declared or paid any dividend or made any other distribution on or in respect to its capital stock.

(vii) The Commission has not issued an order preventing or suspending the use of any Preliminary Prospectus, any Issuer Free Writing Prospectus or the Prospectus, and no proceeding for that purpose or pursuant to Section 8A of the Act has been instituted or, to the Company’s knowledge, threatened by the Commission. The Registration Statement contains, and the

Prospectus and any amendments or supplements thereto will contain, all statements which are required to be stated therein by, and conforms, and will conform, to the requirements of the Act and the Rules and Regulations. As of the applicable effective date of the Registration Statement and any amendment thereto, the Registration Statement did not contain, and will not contain, any untrue statement of a material fact and did not omit, and will not omit, to state a material fact required to be stated therein or necessary in order to make the statements therein not misleading. As of the date of the Prospectus and any amendment or supplement thereto and as of the Closing Date and the Option Closing Date, as the case may be, the Prospectus and any amendments and supplements thereto will not contain any untrue statement of a material fact and will not omit to state a material fact necessary in order to make the statements therein, in the light of the circumstances under which they were made, not misleading; provided, however, that the Company makes no representations or warranties as to information contained in or omitted from the Registration Statement or the Prospectus, or any such amendment or supplement, made in reliance upon, and in conformity with, written information furnished to the Company by or on behalf of any Underwriter through the Representatives, specifically for use therein, it being understood and agreed that the only such information is that described in Section 13 herein.

(viii) The Company has not, directly or indirectly, distributed and will not distribute any offering material in connection with the offering and sale of the Shares other than any Preliminary Prospectus, the Prospectus and other materials, if any, permitted under the Act and consistent with Section 4(a)(ii) below. The Company will file with the Commission all Issuer Free Writing Prospectuses as required under Rule 433(d) under the Act.

(ix) The consolidated financial statements of the Company and the Subsidiaries, together with related notes as set forth in the Registration Statement, the General Disclosure Package and the Prospectus, present fairly the financial position of the Company and the Subsidiaries at the indicated dates and the results of operations and cash flows of the Company and the Subsidiaries for the indicated periods. Such financial statements have been prepared in accordance with generally accepted principles of accounting (“GAAP”), consistently applied throughout the periods covered thereby, except in the case of unaudited financial statements, which are subject to normal year-end adjustments and do not contain certain footnotes as permitted by applicable rules of the Commission, and all adjustments necessary for a fair presentation of results for such periods have been made. The summary and selected consolidated financial and statistical data included in the Registration Statement, the General Disclosure Package and the Prospectus present fairly the information shown therein and such data have been compiled on a basis consistent with the financial statements presented therein from the books and records of the Company. The pro forma financial information included in the Registration Statement, the General Disclosure Package and the Prospectus present fairly the information shown therein, have been compiled on the pro forma bases described therein, and, in the opinion of the Company, the assumptions used in the preparation thereof are reasonable and the adjustments used therein are appropriate to give effect to the transactions or circumstances referred to therein. All disclosures contained in the Registration Statement, the General Disclosure Package and the Prospectus regarding “non-GAAP financial measures” (as such term is defined by the Rules and Regulations) comply in all material respects with Regulation G of the Securities Exchange Act of 1934, as amended (the “Exchange Act”) and Item 10 of Regulation S-K under the Act, to the extent applicable. The Company and the Subsidiaries do not have any liabilities or obligations, direct or contingent (including any off-

balance sheet obligations or any “variable interest entities” within the meaning of Financial Accounting Standards Board Interpretation No. 46), that could reasonably be expected to materially affect the Company’s liquidity or the availability of or requirements for its capital resources that are required to be disclosed in the Registration Statement, the General Disclosure Package and the Prospectus and have not been described as required. There are no financial statements (historical or pro forma) or schedules that are required to be included in the Registration Statement, the General Disclosure Package or the Prospectus that are not included as required.

(x) McGladrey & Pullen, LLP and Deloitte & Touche LLP, who have certified certain of the financial statements filed with the Commission as part of the Registration Statement, the General Disclosure Package and the Prospectus, are independent registered public accounting firms with respect to the Company and the Subsidiaries within the applicable Rules and Regulations and the applicable rules and regulations adopted by the Public Company Accounting Oversight Board (United States) and as required by the Act.

(xi) Except as disclosed in the Registration Statement, the General Disclosure Package and the Prospectus, neither the Company nor any of the Subsidiaries is aware of any material weakness in its internal control over financial reporting or any change in internal control over financial reporting, since January 1, 2007, that has materially affected, or is reasonably likely to materially affect, the Company’s internal control over financial reporting.

(xii) Solely to the extent that the Sarbanes-Oxley Act of 2002, as amended, and the rules and regulations promulgated by the Commission and the Nasdaq Global Market thereunder (the “Sarbanes-Oxley Act”) has been applicable to the Company, there is and has been no failure on the part of the Company to comply in all material respects with any applicable provision of the Sarbanes-Oxley Act. The Company has taken all necessary actions to ensure that it is in compliance in all material respects with all provisions of the Sarbanes-Oxley Act that are in effect and with which the Company is required to comply and is actively taking steps to ensure that it will be in timely compliance in all material respects with other provisions of the Sarbanes-Oxley Act not currently in effect or which will become applicable to the Company.

(xiii) Except as set forth in the Registration Statement, the General Disclosure Package and the Prospectus, there is no action, suit, claim or proceeding pending or, to the knowledge of the Company, threatened against the Company or any of the Subsidiaries before any court or administrative agency or otherwise that individually or in the aggregate, if determined adversely to the Company or any of the Subsidiaries would reasonably be expected to either (i) have a Material Adverse Effect or (ii) prevent the consummation of the transactions contemplated hereby.

(xiv) The Company and the Subsidiaries have good and marketable title to all of the properties and assets that are material to the respective businesses of the Company and the Subsidiaries or are described in the Registration Statement, the General Disclosure Package and the Prospectus, subject to no lien, mortgage, pledge, charge or encumbrance of any kind except those that (i) are reflected in such financial statements or described in the Registration Statement, the General Disclosure Package and the Prospectus or (ii) do not materially interfere with the use made and proposed to be made of such property or assets by the Company and the Subsidiaries. The Company and the Subsidiaries occupy their leased properties under valid and binding leases

conforming in all material respects to the descriptions thereof set forth in the Registration Statement, the General Disclosure Package and the Prospectus.

(xv) Except as described in the Registration Statement, the General Disclosure Package and the Prospectus, the Company and the Subsidiaries have filed all Federal, State, local and foreign tax returns which have been required to be filed through the date hereof and have paid all taxes indicated by such returns and all assessments received by them or any of them to the extent that such taxes have become due and are not being contested in good faith and for which an adequate reserve for accrual has been established in accordance with GAAP. Except as otherwise disclosed in the Registration Statement, the General Disclosure Package and the Prospectus, all material tax liabilities have been adequately provided for in the financial statements of the Company, and the Company does not know of any actual or proposed additional material tax assessments.

(xvi) Since the respective dates as of which information is given in the Registration Statement, the General Disclosure Package and the Prospectus, (i) there has not been any material adverse change or any development involving a prospective material adverse change in or affecting the earnings, business, management, properties, assets, operations, condition (financial or otherwise) or prospects of the Company and the Subsidiaries taken as a whole, whether or not occurring in the ordinary course of business, (ii) there has not been any transaction entered into by the Company or any Subsidiary, nor transaction that is probable of being entered into by the Company or any Subsidiary, that is material to the Company or the Subsidiaries, taken as a whole, other than transactions in the ordinary course of business and changes and transactions described in the Registration Statement, the General Disclosure Package and the Prospectus and (iii) the Company and the Subsidiaries have incurred no material contingent obligations which are not reflected in the Company’s financial statements included in the Registration Statement, the General Disclosure Package and the Prospectus.

(xvii) Neither the Company nor any of the Subsidiaries is or with the giving of notice or lapse of time or both, will be, (i) in violation of its certificate or articles of incorporation, by-laws, certificate of formation, limited liability agreement, partnership agreement or other organizational documents or (ii) in default under any agreement, lease, contract, indenture or other instrument or obligation to which it is a party or by which it, or any of its properties, is bound and, solely with respect to this clause (ii), which violation or default would have a Material Adverse Effect. The execution and delivery and performance by the Company of this Agreement will not (A) conflict with or result in a breach of any of the terms or provisions of, or constitute a default under, any indenture, mortgage, deed of trust or other agreement or instrument to which the Company or any Subsidiary is a party or by which the Company or any Subsidiary or any of their respective properties is bound, (B) result in any violation of the provisions of the certificate or articles of incorporation or by-laws of the Company or (C) result in the violation of any applicable law or statute or any order, rule or regulation, judgment, order, writ or decree of any court or of any governmental, regulatory or administrative agency or other governmental body having jurisdiction over the Company or any of the Subsidiaries.

(xviii) The execution and delivery of, and the performance by the Company of its obligations under, this Agreement have been duly and validly authorized by all necessary corporate

action on the part of the Company, and this Agreement has been duly executed and delivered by the Company.

(xix) Each approval, consent, order, authorization, designation, declaration or filing by or with any regulatory, administrative or other governmental body or other third party necessary in connection with the execution and delivery by the Company of this Agreement and the consummation of the transactions herein contemplated (except such additional steps as may be required by the Commission, the National Association of Securities Dealers, Inc. (the “NASD”) or such additional steps as may be necessary to qualify the Shares for public offering by the Underwriters under state securities or Blue Sky laws) has been obtained or made and is in full force and effect.

(xx) Except as described in the Registration Statement, the General Disclosure Package and the Prospectus, the Company and each of the Subsidiaries hold all material licenses, certificates and permits from governmental authorities that are necessary to the conduct of their businesses; the Company and the Subsidiaries each own or possess the right to use and operate under all material patents, patent rights, trademarks, trade names, service marks, service names, copyrights, licenses, know-how (including trade secrets and other unpatented and unpatentable proprietary or confidential information, systems or procedures) and other intellectual property rights necessary to carry on their respective businesses in all material respects (collectively, “Intellectual Property”); neither the Company nor any of the Subsidiaries has infringed, and none of the Company or the Subsidiaries have received notice of conflict with, any Intellectual Property of any other person or entity, except such as would not, if determined adversely to the Company or any of the Subsidiaries, individually or in the aggregate, be reasonably expected to have a Material Adverse Effect. There are no outstanding options, licenses or agreements of any kind relating to the Intellectual Property of the Company that are required to be described in the Registration Statement, the General Disclosure Package and the Prospectus and are not described in all material respects. The Company is not a party to or bound by any options, licenses or agreements with respect to the Intellectual Property of any other person or entity that are required to be set forth in the Prospectus and are not described in all material respects. None of the technology employed by the Company has been obtained or is being used by the Company in violation of any contractual obligation binding on the Company or, to the knowledge of the Company, any of its officers, directors or employees or otherwise in violation of the rights of any persons. Except as described in the Registration Statement, the General Disclosure Package and the Prospectus, the Company has not received any written or oral communications alleging that the Company has violated, infringed or conflicted with, or, by conducting its business as set forth in the Registration Statement, the General Disclosure Package and the Prospectus, would reasonably be expected to violate, infringe or conflict with, any of the Intellectual Property of any other person or entity. The Company knows of no infringement by others of Intellectual Property owned by or licensed to the Company.

(xxi) Neither the Company, nor to the Company’s knowledge, any of its affiliates, has taken, directly or indirectly, any action designed to cause or result in, or which might reasonably have been expected to cause or result in, the stabilization or manipulation of the price of the shares of Common Stock to facilitate the sale or resale of the Shares in violation of applicable law. The Company acknowledges that the Underwriters may engage in passive market making transactions

in the Shares on the Nasdaq Global Market in accordance with Regulation M under the Exchange Act.

(xxii) Neither the Company nor any Subsidiary is and, after giving effect to the offering and sale of the Shares contemplated hereunder and the application of the net proceeds from such sale as described in the Registration Statement, the General Disclosure Package and the Prospectus, will be required to register as an “investment company” within the meaning of such term under the Investment Company Act of 1940, as amended, and the rules and regulations of the Commission thereunder (collectively, the “1940 Act”).

(xxiii) The Company and each of the Subsidiaries maintains a system of “internal control over financial reporting” (as defined in Rule 13a-15(f) under the Exchange Act) sufficient to provide reasonable assurance that (i) transactions are executed in accordance with management’s general or specific authorization; (ii) transactions are recorded as necessary to permit preparation of financial statements in conformity with GAAP and to maintain accountability for assets; (iii) access to assets is permitted only in accordance with management’s general or specific authorization; and (iv) the recorded accountability for assets is compared with existing assets at reasonable intervals and appropriate action is taken with respect to any differences.

(xxiv) The Company has established and maintains “disclosure controls and procedures” (as defined in Rules 13a-15(e) and 15d-15(e) under the Exchange Act); the Company’s “disclosure controls and procedures” are reasonably designed to ensure that information (both financial and non-financial) required to be disclosed by the Company in the reports that it will file or submit under the Exchange Act will be recorded, processed, summarized and reported within the time periods specified in the rules and regulations under the Exchange Act, and that all such information will be accumulated and communicated to the Company’s management as appropriate to allow timely decisions regarding required disclosure and to make the certifications of the principal executive officer and principal financial officer of the Company required under the Exchange Act with respect to such reports.

(xxv) The statistical, industry-related and market-related data included in the Registration Statement, the General Disclosure Package and the Prospectus are based on or derived from sources which the Company reasonably and in good faith believes are reliable and accurate in all material respects.

(xxvi) The operations of the Company and its subsidiaries are and have been conducted at all times in compliance in all material respects with applicable financial record-keeping and reporting requirements of the Currency and Foreign Transactions Reporting Act of 1970, as amended, applicable money laundering statutes and applicable rules and regulations thereunder (collectively, the “Money Laundering Laws”), and no action, suit or proceeding by or before any court or governmental agency, authority or body or any arbitrator involving the Company or any of its Subsidiaries with respect to the Money Laundering Laws is pending or, to the Company’s knowledge, threatened.

(xxvii) Neither the Company nor, to the Company’s knowledge, any director, officer, agent, employee or affiliate of the Company is currently subject to any U.S. sanctions administered by the Office of Foreign Assets Control of the U.S. Treasury Department (“OFAC”); and the Company will not directly or indirectly use its proceeds of the offering of Shares hereunder, or lend, contribute or otherwise make available such proceeds to any Subsidiary, joint venture partner or other person or entity, for the purpose of financing the activities of any person currently subject to any U.S. sanctions administered by OFAC.

(xxviii) The Company and each of the Subsidiaries carry, or are covered by, insurance in such amounts and covering such risks as is adequate for the conduct of their respective businesses and the value of their respective properties and as is customary for companies engaged in similar businesses.

(xxix) The Company and each Subsidiary is in compliance in all material respects with all presently applicable provisions of the Employee Retirement Income Security Act of 1974, as amended, including the regulations and published interpretations thereunder (“ERISA”); no “reportable event” (as defined in ERISA) has occurred with respect to any “pension plan” (as defined in ERISA) for which the Company and each Subsidiary would have any liability; the Company and each Subsidiary has not incurred and does not expect to incur liability under (i) Title IV of ERISA with respect to termination of, or withdrawal from, any “pension plan” or (ii) Sections 412 or 4971 of the Internal Revenue Code of 1986, as amended, including the regulations and published interpretations thereunder (the “Code”); and each “pension plan” for which the Company or any Subsidiary would have any liability that is intended to be qualified under Section 401(a) of the Code is so qualified in all material respects and, to the Company’s knowledge, nothing has occurred, whether by action or by failure to act, which would cause the loss of such qualification.

(xxx) To the Company’s knowledge, there are no affiliations or associations between any member of the NASD and any of the Company’s officers, directors or holders of 5% of more of the Common Stock outstanding on the date hereof, except as set forth in the Registration Statement or otherwise described in writing in the response to questionnaires relating to NASD matters previously delivered to the Representatives.

(xxxi) Neither the Company nor any of the Subsidiaries is in violation of any applicable statute, rule, regulation, decision or order of any governmental agency or body or any court, domestic or foreign, relating to the use, disposal or release of hazardous or toxic substances or relating to the protection or restoration of the environment or human exposure to hazardous or toxic substances (collectively, “environmental laws”), owns or operates any real property contaminated with any substance that is subject to environmental laws, is liable for any off-site disposal or contamination pursuant to any environmental laws, or is subject to any claim relating to any environmental laws, which violation, contamination, liability or claim would, individually or in the aggregate, have a Material Adverse Effect; and the Company is not aware of any pending investigation which might lead to such a claim.

(xxxii) The Shares have been approved for listing subject to notice of issuance on the Nasdaq Global Market.

(xxxiii) There are no relationships or related-party transactions involving the Company or any of the Subsidiaries or any other person required to be described in the Registration Statement, the General Disclosure Package and the Prospectus which have not been described in such documents.

(xxxiv) Neither the Company nor any of the Subsidiaries has made any contribution or other payment to any official of, or candidate for, any federal, state or foreign office in violation of any applicable law which violation is required to be disclosed in the Prospectus which has not been described in the Prospectus.

(xxxv) As of the date of the initial filing of the registration statement referred to in Section 1(a)(i) herein, there were no outstanding personal loans made, directly or indirectly, by the Company to any director or executive officer of the Company.

(xxxvi) Except as disclosed in the Registration Statement, the General Disclosure Package and the Prospectus, no Subsidiary of the Company is currently prohibited, directly or indirectly, from paying any dividends to the Company, from making any other distribution on such Subsidiary’s capital stock, from repaying to the Company any loans or advances to such subsidiary from the Company or from transferring any of such Subsidiary’s property or assets to the Company or any other Subsidiary of the Company.

(xxxvii) Neither the Company nor any of its Subsidiaries nor any director or officer of the Company or any of its Subsidiaries is aware of or has taken any action, directly or indirectly, that would result in a violation by such Persons of the Foreign Corrupt Practices Act of 1977, as amended, and the rules and regulations thereunder (the “FCPA”), including, without limitation, making use of the mails or any means or instrumentality of interstate commerce corruptly in furtherance of an offer, payment, promise to pay or authorization of the payment of any money, or other property, gift, promise to give, or authorization of the giving of anything of value to any “foreign official” (as such term is defined in the FCPA) or any foreign political party or official thereof or any candidate for foreign political office, in contravention of the FCPA; and neither the Company nor any of its Subsidiaries nor any director or officer is aware of any such action taken by any agent, employee or affiliate of the Company. Neither the Company nor any of its Subsidiaries conduct business in any country or other foreign jurisdiction outside the United States other than the provision of access to long distance telephone service within the United States that may terminate outside of the United States.

(xxxviii) (A) None of the Company or any of its Subsidiaries is party to or bound by any collective bargaining agreement with any labor organization; (B) none of the employees of the Company and each of its Subsidiaries is represented by a labor union, and, to the knowledge of the Company, no union organizing activities are taking place that would, individually or in the aggregate, have a Material Adverse Effect; (C) to the Company’s knowledge, no union organizing or decertification efforts are underway or threatened against the Company or any of its Subsidiaries; (D) no labor strike, work stoppage, slowdown or other material labor dispute is pending against the Company or any of its Subsidiaries; (E) there is no worker’s compensation liability, experience or matter that would, individually or in the aggregate, have a Material Adverse Effect; (G) to the knowledge of the Company, there is no threatened or pending liability against the Company or any of its Subsidiaries pursuant to the Worker Retraining and Notification of 1988, as amended, or any similar applicable state or local law; (H) there is no employment-related charge complaint, grievance, investigation, unfair labor practice claim or injury of any kind pending against the Company or any of its Subsidiaries that would, individually or in the aggregate, have a Material Adverse Effect; and (I) to the knowledge of the Company, no employee or agent of the Company or

any of its Subsidiaries has committed any act or omission giving rise to liability for any violation identified in subsections (D) and (E) above, other than such acts or omissions that would, individually or in the aggregate, have a Material Adverse Effect; and (J) no term or condition or employment exists through arbitration awards, settlement agreements or side agreements that is contrary to the express terms of any applicable collective bargaining agreement.

(xxxix) To the knowledge of the Company, all of the information provided to the Representatives or to counsel for the Representatives by the Company, or its officers and directors in connection with the letters, filings or other supplemental information provided to NASD Regulation Inc. pursuant to NASD Conduct Rule 2710 or 2720 is true, complete and correct in all material respects.

(xl) Except as disclosed in the General Disclosure Package, there are no contracts, agreements or understandings (other than this Agreement) between the Company and any person that would give rise to a valid claim against the Company or any Underwriter for a brokerage commission, finder’s fee or other like payment in connection with this offering.

(b) Each of the Selling Shareholders severally represents and warrants as follows:

(i) Such Selling Shareholder now has and at the Closing Date and the Option Closing Date, as the case may be, will have good and marketable title to the Firm Shares and the Option Shares to be sold by such Selling Shareholder, free and clear of any liens, encumbrances, equities and claims, and full right, power and authority to effect the sale and delivery of such Firm Shares and Option Shares; and upon the delivery of, against payment for, such Firm Shares and Option Shares pursuant to this Agreement, the Underwriters will acquire good and marketable title thereto, free and clear of any liens, encumbrances, equities and claims.

(ii) Such Selling Shareholder has full right, power and authority to execute and deliver this Agreement, the Power of Attorney and the Custody Agreement referred to below and to perform its obligations under such Agreements. This Agreement has been duly authorized, executed and delivered by or on behalf of such Selling Shareholder. Each of the Power of Attorney and the Custody Agreement has been duly authorized, executed and delivered by or on behalf of such Selling Shareholder and are valid and binding agreements of such Selling Shareholder, enforceable against such Selling Shareholder in accordance with its terms. The execution and delivery of this Agreement and the consummation by such Selling Shareholder of the transactions herein contemplated and the fulfillment by such Selling Shareholder of the terms hereof will not require any consent, approval, authorization, or other order of any court, regulatory body, administrative agency or other governmental body (except as may be required under the Act, state securities laws or Blue Sky laws) and will not result in a breach of any of the terms and provisions of, or constitute a default under, organizational documents of such Selling Shareholder, if not an individual, or any indenture, mortgage, deed of trust or other agreement or instrument to which such Selling Shareholder is a party, or of any order, rule or regulation applicable to such Selling Shareholder of any court or of any regulatory body or administrative agency or other governmental body having jurisdiction.

(iii) Such Selling Shareholder has not taken, directly or indirectly, any action designed to, cause or result in, or which might reasonably be expected to cause or result in the stabilization or manipulation of the price of the shares of Common Stock in violation of applicable law.

(iv) The information pertaining to such Selling Shareholder under the caption “Selling Shareholders” in the Registration Statement and the Prospectus (and any similar section or information contained in the General Disclosure Package) is complete and accurate in all material respects.

(v) To the knowledge of such Selling Shareholder, all of the information provided to the Representatives or to counsel for the Representatives by such Selling Shareholder in connection with the letters, filings or other supplemental information provided to NASD Regulation Inc. pursuant to NASD Conduct Rule 2710 or 2720 is true and correct in all material respects.

(vi) No consent, approval or waiver is required under any instrument or agreement to which such Selling Shareholder is a party or by which such Selling Shareholder is bound or under which he, she or it is entitled to any right or benefit, in connection with the offering, sale or purchase by the Underwriters of any of the Shares which may be sold by such Selling Shareholder under this Agreement or the consummation by such Selling Shareholder of any of the other transactions contemplated hereby.

(vii) Neither such Selling Shareholder nor any affiliate of such Selling Shareholder is affiliated or associated with a member of the NASD, except as set forth in the Registration Statement or otherwise described in writing in the responses to questionnaires relating to NASD matters previously delivered to the Representatives.

(viii) Except as disclosed in the General Disclosure Package, there are no contracts, agreements or understandings (other than this Agreement) between such Selling Shareholder and any person that would give rise to a valid claim against such Selling Shareholder or any Underwriter for a brokerage commission, finder’s fee or other like payment in connection with this offering.

2. PURCHASE, SALE AND DELIVERY OF THE FIRM SHARES.

(a) On the basis of the representations, warranties and covenants herein contained, and subject to the conditions herein set forth, the Sellers, severally and not jointly, agree to sell to the Underwriters and each Underwriter agrees, severally and not jointly, to purchase, at a price of $ per Share, the number of Firm Shares set forth opposite the name of each Underwriter in Schedule I hereof, subject to adjustments in accordance with Section 9 hereof. The number of Firm Shares to be purchased by each Underwriter from each Seller, and the number of shares each Seller shall be obligated to sell, shall be as nearly as practicable in the same proportion to the total number of Firm Shares being sold by each Seller as the number of Firm Shares being purchased by each Underwriter bears to the total number of Firm Shares to be sold hereunder. The obligations of the Company and of each of the Selling Shareholders shall be several and not joint.

(b) Certificates in negotiable form for the total number of the Shares to be sold hereunder by the Selling Shareholders have been placed in custody with the Company, as custodian (the “Custodian”) pursuant to a Custody Agreement executed by each Selling Shareholder for delivery of all Firm Shares and any Option Shares to be sold hereunder by the Selling Shareholders. Each of the Selling Shareholders specifically agrees that the Firm Shares and any Option Shares represented by the certificates held in custody for the Selling Shareholders under the Custody Agreement are subject to the interests of the Underwriters hereunder, that the arrangements made by the Selling Shareholders for such custody are to that extent irrevocable, and that the obligations of the Selling Shareholders hereunder shall not be terminable by any act or deed of the Selling Shareholders (or by any other person, firm or corporation including the Company, either in its own capacity or in its capacity as Custodian or the Underwriters) or by operation of law (including the death of an individual Selling Shareholder or the dissolution of a corporate Selling Shareholder) or by the occurrence of any other event or events, except as set forth in the Custody Agreement. If any such event should occur prior to the delivery to the Underwriters of the Firm Shares or the Option Shares hereunder, certificates for the Firm Shares or the Options Shares, as the case may be, shall be delivered by the Custodian in accordance with the terms and conditions of this Agreement as if such event has not occurred. The Custodian is authorized to receive and acknowledge receipt of the proceeds of sale of the Shares held by it against delivery of such Shares.

(c) Payment for the Firm Shares to be sold hereunder is to be made in Federal (same day) funds to an account designated by the Company for the Shares to be sold by it and to an account designated by the Custodian for the Shares to be sold by the Selling Shareholders, in each case against delivery of certificates therefor to the Representatives for the several accounts of the Underwriters. Such payment and delivery are to be made through the facilities of The Depository Trust Company at 10:00 a.m., New York time, on , , , 2007, or at such other time and date not later than five business days thereafter as the Representatives and the Company shall agree upon in writing, such time and date being herein referred to as the “Closing Date.” (As used herein, “business day” means a day on which the New York Stock Exchange is open for trading and on which banks in New York are open for business and not permitted by law or executive order to be closed.) The certificates, if any, for the Firm Shares will be delivered in such denominations and in such registrations as the Representatives request in writing not later than the second full business day prior to the Closing Date, and will be made available for inspection by the Representatives at the office of DBSI set forth above not later than 1:00 P.M., New York time, on the business day prior to the Closing Date.

(d) In addition, on the basis of the representations and warranties herein contained and subject to the terms and conditions herein set forth, the Company and the Selling Shareholders listed on Schedule III hereto hereby severally grant an option to the several Underwriters to purchase the Option Shares at the price per share as set forth in the first paragraph of this Section 2. The maximum number of Option Shares to be sold by the Company and the Selling Shareholders is set forth opposite their respective names on Schedule III hereto. The option granted hereby may be exercised in whole or in part by giving written notice (i) at any time before the Closing Date and (ii) at any time, from time to time thereafter (but no more than four times) within 30 days after the date of this Agreement, by you, as the Representatives of the several Underwriters, to the Company, the Attorney-in-Fact, and the Custodian setting forth the number of Option Shares as to which the

several Underwriters are exercising the option and the time and date at which such certificates are to be delivered. If the option granted hereby is exercised in part, the respective number of Option Shares to be sold by the Company and each of the Selling Shareholders listed in Schedule III hereto shall be determined on a pro rata basis in accordance with the percentages set forth opposite their names on Schedule III hereto, adjusted by you in such manner as to avoid fractional shares. The time and date at which certificates for Option Shares are to be delivered shall be determined by the Representatives but shall not be earlier than three nor later than ten full business days after the exercise of such option, nor in any event prior to the Closing Date (such time and date being herein referred to as the “Option Closing Date”). If the date of exercise of the option is three or more days before the Closing Date, the notice of exercise shall set the Closing Date as the Option Closing Date. The number of Option Shares to be purchased by each Underwriter shall be in the same proportion to the total number of Option Shares being purchased as the number of Firm Shares being purchased by such Underwriter bears to the total number of Firm Shares, adjusted by you in such manner as to avoid fractional shares. The option with respect to the Option Shares granted hereunder may be exercised only to cover over-allotments in the sale of the Firm Shares by the Underwriters. You, as Representatives of the several Underwriters, may cancel such option at any time prior to its expiration by giving written notice of such cancellation to the Company and the Attorney-in-Fact. To the extent, if any, that the option is exercised, payment for the Option Shares shall be made on the Option Closing Date in Federal (same day) funds drawn to the order of the Company for the Option Shares to be sold by it and to the order of “McLeodUSA Incorporated, as Custodian” for the Option Shares to be sold by the Selling Shareholders against delivery of certificates therefor through the facilities of The Depository Trust Company.

(e) If on the Closing Date or Option Closing Date, as the case may be, any Selling Shareholder fails to sell the Firm Shares or Option Shares which such Selling Shareholder has agreed to sell on such date as set forth in Schedule II hereto, the Company agrees that it will sell or arrange for the sale of that number of shares of Common Stock to the Underwriters which represents Firm Shares or the Option Shares which such Selling Shareholder has failed to so sell, as set forth in Schedule II hereto, or such lesser number as may be requested by the Representatives.

3. OFFERING BY THE UNDERWRITERS.

It is understood that the several Underwriters are to make a public offering of the Firm Shares as soon as the Representatives deem it advisable to do so. The Firm Shares are to be initially offered to the public at the initial public offering price set forth in the Prospectus. The Representatives may from time to time thereafter change the public offering price and other selling terms.

It is further understood that you will act as the Representatives for the Underwriters in the offering and sale of the Shares in accordance with a Master Agreement Among Underwriters entered into by you and the several other Underwriters.

4. COVENANTS OF THE COMPANY AND THE SELLING SHAREHOLDERS.

(a) The Company covenants and agrees with the several Underwriters that:

(i) The Company will (A) prepare and timely file with the Commission under Rule 424(b) under the Act a Prospectus in a form approved by the Representatives containing information previously omitted at the time of effectiveness of the Registration Statement in reliance on Rule 430A under the Act and (B) not file any amendment to the Registration Statement or distribute an amendment or supplement to the General Disclosure Package or the Prospectus of which the Representatives shall not previously have been advised and furnished with a copy or to which the Representatives shall have reasonably objected in writing or which is not in compliance with the Rules and Regulations.

(ii) The Company will (i) not make any offer relating to the Shares that would constitute an Issuer Free Writing Prospectus or that would otherwise constitute a “free writing prospectus” (as defined in Rule 405 under the Act) required to be filed by the Company with the Commission under Rule 433 under the Act unless the Representatives approve its use in writing prior to first use (each, a “Permitted Free Writing Prospectus”); provided that the prior written consent of the Representatives hereto shall be deemed to have been given in respect of the Issuer Free Writing Prospectus(es) included in Schedule V hereto, (ii) treat each Permitted Free Writing Prospectus as an Issuer Free Writing Prospectus, (iii) comply with the requirements of Rules 164 and 433 under the Act applicable to any Issuer Free Writing Prospectus, including the requirements relating to timely filing with the Commission, legending and record keeping, and (iv) not take any action that would result in an Underwriter or the Company being required to file with the Commission pursuant to Rule 433(d) under the Act a free writing prospectus prepared by or on behalf of such Underwriter that such Underwriter otherwise would not have been required to file thereunder. The Company will satisfy the conditions in Rule 433 under the Act to avoid a requirement to file with the Commission any electronic road show.

(iii) The Company will prepare a final term sheet (the “Final Term Sheet”) reflecting the final terms of the Shares, in form and substance satisfactory to the Representatives, and shall file such Final Term Sheet as an Issuer Free Writing Prospectus pursuant to Rule 433 under the Act prior to the close of business two business days after the date hereof; provided that the Company shall provide the Representatives with copies of any such Final Term Sheet a reasonable amount of time prior to such proposed filing and will not use or file any such document to which the Representatives or counsel to the Underwriters shall reasonably object.

(iv) The Company will advise the Representatives promptly (A) when the Registration Statement or any post-effective amendment thereto shall have become effective, (B) of receipt of any comments from the Commission, (C) of any request of the Commission for amendment of the Registration Statement or for supplement to the General Disclosure Package or the Prospectus or for any additional information, and (D) of the issuance by the Commission of any stop order suspending the effectiveness of the Registration Statement or any order preventing or suspending the use of any Preliminary Prospectus, any Issuer Free Writing Prospectus or the Prospectus, or of the institution of any proceedings for that purpose or pursuant to Section 8A of the Act. The Company will use commercially reasonable efforts to prevent the issuance of any such order and to obtain as soon as possible the lifting thereof, if issued.

(v) The Company will cooperate with the Representatives in endeavoring to qualify the Shares for sale under the securities laws of such jurisdictions as the Representatives may reasonably have designated in writing and will make such applications, file such documents, and furnish such information as may be reasonably required for that purpose, provided the Company shall not be required to qualify as a foreign corporation or as a dealer in securities in any such jurisdiction where it would not otherwise be required to so qualify, file a general consent to service of process in any such jurisdiction or subject itself to taxation in any such jurisdiction if it is not otherwise so subject. The Company will, from time to time, prepare and file such statements, reports, and other documents, as are or may be required to continue such qualifications in effect for so long a period as the Representatives may reasonably request for distribution of the Shares.

(vi) The Company will deliver to, or upon the order of, the Representatives, from time to time, as many copies of any Preliminary Prospectus as the Representatives may reasonably request. The Company will deliver to, or upon the order of, the Representatives, from time to time, as many copies of any Issuer Free Writing Prospectus as the Representatives may reasonably request. The Company will deliver to, or upon the order of, the Representatives during the period when delivery of a Prospectus (or, in lieu thereof, the notice referred to under Rule 173(a) under the Act) (the “Prospectus Delivery Period”) is required under the Act, as many copies of the Prospectus in final form, or as thereafter amended or supplemented, as the Representatives may reasonably request. The Company will deliver to the Representatives at or before the Closing Date, four signed copies of the Registration Statement and all amendments thereto including all exhibits filed therewith, and will deliver to the Representatives such number of copies of the Registration Statement (including such number of copies of the exhibits filed therewith that may reasonably be requested), and of all amendments thereto, as the Representatives may reasonably request.

(vii) The Company will comply with the Act and the Rules and Regulations, and the Exchange Act, and the rules and regulations of the Commission thereunder, so as to permit the completion of the distribution of the Shares as contemplated in this Agreement and the Prospectus. If during the Prospectus Delivery Period, any event shall occur as a result of which, in the judgment of the Company or in the reasonable opinion of the Underwriters, it becomes necessary to amend or supplement the Prospectus in order to make the statements therein, in the light of the circumstances existing at the time the Prospectus is delivered to a purchaser, not misleading, or, if it is necessary at any time to amend or supplement the Prospectus to comply with any law, the Company promptly will prepare and file with the Commission an appropriate amendment to the Registration Statement or supplement to the Prospectus so that the Prospectus as so amended or supplemented will not, in light of the circumstances when it is so delivered, be misleading, or so that the Prospectus will comply with the law.

(viii) If the General Disclosure Package is being used to solicit offers to buy the Shares at a time when the Prospectus is not yet available to prospective purchasers and any event shall occur as a result of which, in the judgment of the Company or in the reasonable opinion of the Underwriters, it becomes necessary to amend or supplement the General Disclosure Package in order to make the statements therein, in the light of the circumstances, not misleading, or to make the statements therein not conflict with the information contained in the Registration Statement then on file, or if it is necessary at any time to amend or supplement the General Disclosure Package to

comply with any law, the Company promptly will prepare, file with the Commission (if required) and furnish to the Underwriters and any dealers an appropriate amendment or supplement to the General Disclosure Package so that the General Disclosure Package as so amended or supplemented will not, in light of the circumstances when it is so delivered, be misleading, or so that the General Disclosure Package will comply with the law.

(ix) The Company will make generally available to its security holders and the Representatives, as soon as it is practicable to do so, but in any event not later than 15 months after the effective date of the Registration Statement, an earnings statement (which need not be audited) in reasonable detail, covering a period of at least 12 consecutive months beginning after the effective date of the Registration Statement, which earnings statement shall satisfy the requirements of Section 11(a) of the Act and Rule 158 under the Act.

(x) Prior to the Closing Date, the Company will furnish to the Underwriters, as soon as they have been prepared by or are available to the Company, a copy of any unaudited interim financial statements of the Company for any period subsequent to the period covered by the most recent financial statements appearing in the Registration Statement, the General Disclosure Package and the Prospectus.

(xi) No offering, sale, short sale or other disposition of any shares of Common Stock or other securities convertible into or exchangeable or exercisable for shares of Common Stock or derivative of Common Stock (or agreement for such), except for the issuance of shares of Common Stock upon the exercise of outstanding options under employee stock option plans described in the Registration Statement, the General Disclosure Package and the Prospectus, and the grant of options to purchase shares of Common Stock under such plans, will be made for a period of 180 days after the date of the Prospectus, directly or indirectly, by the Company otherwise than hereunder or with the prior written consent of the Representatives. Notwithstanding the foregoing, if (1) during the last 17 days of the 180-day restricted period, the Company issues an earnings release or material news or a material event relating to the Company occurs; or (2) prior to the expiration of the 180-day restricted period, the Company announces that it will release earnings results during the 16-day period following the last day of the 180-day restricted period, then in each case the restrictions imposed by this Agreement shall continue to apply until the expiration of the 18-day period beginning on the date of the release of the earnings results or the occurrence of material news or a material event relating to the Company, as the case may be, unless the Representatives waive, in writing, such extension.

(xii) The Company will use its best efforts to, subject to notice of issuance, effect and maintain the listing of the Shares on the Nasdaq Global Market.

(xiii) The Company shall apply the net proceeds of its sale of Shares as set forth in the Registration Statement, the General Disclosure Package and the Prospectus and shall file such reports with the Commission with respect to the Company’s sale of Shares and its application of its proceeds therefrom as may be required in accordance with Rule 463 under the Act.

(xiv) The Company shall not invest, or otherwise use the proceeds received by the Company from its sale of the Shares in such a manner as would require the Company or any of the Subsidiaries to register as an investment company under the 1940 Act.

(xv) The Company will maintain a transfer agent and, if necessary under the jurisdiction of incorporation of the Company, a registrar for the Common Stock.

(xvi) The Company will not take, directly or indirectly, any action designed to cause or result in, or that has constituted or might reasonably be expected to constitute, the stabilization or manipulation of the price of the shares of Common Stock in violation of applicable law.

(b) Each of the Selling Shareholders covenants and agrees with the several Underwriters that:

(i) No offering, sale, short sale or other disposition of any shares of Common Stock or other capital stock of the Company or other securities convertible, exchangeable or exercisable for Common Stock or derivative of Common Stock owned by the Selling Shareholder or request the registration for the offer or sale of any of the foregoing (or as to which the Selling Shareholder has the right to direct the disposition of) will be made for a period of 180 days after the date of this Agreement, directly or indirectly, by such Selling Shareholder otherwise than as permitted in the “lock-up” agreement described in Section 6(n) hereunder or with the prior written consent of the Representatives. Notwithstanding the foregoing, if (1) during the last 17 days of the 180-day restricted period, the Company issues an earnings release or material news or a material event relating to the Company occurs; or (2) prior to the expiration of the 180-day restricted period, the Company announces that it will release earnings results during the 16-day period following the last day of the 180-day restricted period, then in each case the restrictions imposed by this Agreement shall continue to apply until the expiration of the 18-day period beginning on the date of the release of the earnings results or the occurrence of material news or a material event relating to the Company, as the case may be, unless the Representatives waive, in writing, such extension.

(ii) In order to document the Underwriters’ compliance with the reporting and withholding provisions of the Tax Equity and Fiscal Responsibility Act of 1982 and the Interest and Dividend Tax Compliance Act of 1983 with respect to the transactions herein contemplated, each of the Selling Shareholders agrees to deliver to you prior to or at the Closing Date a properly completed and executed U.S. Treasury Department Form W-8 or W-9 (or other applicable form or statement specified by Treasury Department regulations in lieu thereof).

(iii) Such Selling Shareholder will not take, directly or indirectly, any action designed to cause or result in, or which might reasonably be expected to cause or result in, the stabilization or manipulation of the price of shares of Common Stock in violation of applicable law.

(iv) Such Selling Shareholder agrees that it will not prepare or have prepared on its behalf or use or refer to, any “free writing prospectus” (as defined in Rule 405 under

the Act), and agrees that it will not distribute any written materials in connection with the offer or sale of the Shares.

(v) During the Prospectus Delivery Period, such Selling Shareholder will use commercially reasonable efforts to advise the Representatives promptly, and to confirm such advice in writing to the Representatives, of any material change in the information relating to such Selling Shareholder in the Registration Statement, the General Disclosure Package or the Prospectus.

5. COSTS AND EXPENSES.

The Company will pay all costs, expenses and fees incident to the performance of the obligations of the Sellers under this Agreement, including, without limiting the generality of the foregoing, the following: accounting fees of the Company; the fees and disbursements of counsel for the Company and the Selling Shareholders; any roadshow expenses (subject to the last sentence of this Section 5) the cost of printing and delivering to, or as requested by, the Underwriters copies of the Registration Statement, Preliminary Prospectuses, the Issuer Free Writing Prospectuses, the Prospectus, this Agreement, the Listing Application, the Blue Sky Survey (as defined below) and any supplements or amendments thereto (including the related fees and expenses of counsel for the Underwriters); the filing fees of the Commission; the filing fees and expenses (including legal fees and disbursements) incident to securing any required review by the NASD of the terms of the sale of the Shares; the Listing Fee of the Nasdaq Global Market; the costs and expenses (including without limitation any damages or other amounts payable in connection with legal or contractual liability) associated with the reforming of any contracts for sale of the Shares made by the Underwriters caused by a breach of the representation of Section 1(a)(ii); and the expenses, including the fees and disbursements of counsel for the Underwriters, incurred in connection with the qualification of the Shares under State securities or Blue Sky laws. Any transaction taxes imposed on the sale of the Shares to the several Underwriters will be paid by the Sellers. The Company shall not, however, be required to pay for any of the Underwriters’ expenses including the fees of their counsel (other than those related to qualification under NASD regulation and State securities and Blue Sky laws, which together shall not exceed $10,000), stock transfer taxes on resale of any of the Shares by them and any advertising expenses connected with any offers they may make, except that, if this Agreement shall not be consummated because the conditions in Section 6 hereof are not satisfied, or because this Agreement is terminated by the Representatives pursuant to Section 11 hereof, or by reason of any failure, refusal or inability on the part of the Company or the Selling Shareholders to perform any undertaking or satisfy any condition of this Agreement or to comply with any of the terms hereof on their part to be performed, unless such failure, refusal or inability is due primarily to the default or omission of any Underwriter, the Company shall reimburse the several Underwriters for reasonable out-of-pocket expenses, including reasonable fees and disbursements of counsel, reasonably incurred in connection with investigating, marketing and proposing to market the Shares or in contemplation of performing their obligations hereunder; but the Company and the Selling Shareholders shall not in any event be liable to any of the several Underwriters for damages on account of loss of anticipated profits from the sale by them of the Shares.

6. CONDITIONS OF OBLIGATIONS OF THE UNDERWRITERS.

The several obligations of the Underwriters to purchase the Firm Shares on the Closing Date and the Option Shares, if any, on the Option Closing Date are subject to the accuracy, as of the Applicable Time, the Closing Date or the Option Closing Date, as the case may be, of the representations and warranties of the Company and the Selling Shareholders contained herein, and to the performance by the Company and the Selling Shareholders of their covenants and obligations hereunder and to the following additional conditions:

(a) The Registration Statement and all post-effective amendments thereto shall have become effective and the Prospectus and each Issuer Free Writing Prospectus required shall have been filed as required by Rules 424, 430A, 430B, 430C or 433 under the Act, as applicable, within the time period prescribed by, and in compliance with, the Rules and Regulations, and any request of the Commission for additional information (to be included in the Registration Statement or otherwise) shall have been disclosed to the Representatives and complied with to their reasonable satisfaction. No stop order suspending the effectiveness of the Registration Statement shall have been issued and no proceedings for that purpose or pursuant to Section 8A of the Act shall have been taken or, to the knowledge of the Company or the Selling Shareholders, shall be contemplated or threatened by the Commission and no injunction, restraining order or order of any nature by a Federal or state court of competent jurisdiction shall have been issued as of the Closing Date which would prevent the issuance of the Shares.

(b) The Representatives shall have received on the Closing Date or the Option Closing Date, as the case may be, the opinions of Wilmer Cutler Pickering Hale and Dorr LLP, counsel for the Company and the Subsidiaries, dated the Closing Date or the Option Closing Date, as the case may be, addressed to the Underwriters (and stating that it may be relied upon by counsel to the Underwriters) , in form and substance reasonably satisfactory to the Representatives.

(c) The Representatives shall have received on the Closing Date or the Option Closing Date, as the case may be, the opinions of Bingham McCutchen LLP, special telecommunications counsel for the Company and the Subsidiaries, dated the Closing Date or the Option Closing Date, as the case may be, addressed to the Underwriters (and stating that it may be relied upon by counsel to the Underwriters), in form and substance reasonably satisfactory to the Representatives.

(d) The Representatives shall have received on the Closing Date or the Option Closing Date, as the case may be, the opinions of Shuttleworth & Ingersoll, P.L.C., special Iowa counsel for the Company and certain of the Subsidiaries, dated the Closing Date or the Option Closing Date, as the case may be, addressed to the Underwriters (and stating that it may be relied upon by counsel to the Underwriters), in form and substance reasonably satisfactory to the Representatives.

(e) The Representatives shall have received on the Closing Date or the Option Closing Date, as the case may be, the opinions of Ropes & Gray LLP, counsel for certain of the Selling Shareholders, and the opinions of counsel for the other Selling Shareholders, each dated the Closing Date or the Option Closing Date, as the case may be,

addressed to the Underwriters (and stating that it may be relied upon by counsel to the Underwriters), in form and substance reasonably satisfactory to the Representatives.

(f) The Representatives shall have received from White & Case LLP, counsel for the Underwriters, the opinions dated the Closing Date or the Option Closing Date, as the case may be, in form and substance reasonably satisfactory to the Representatives.

(g) The Representatives shall have received at or prior to the Closing Date from White & Case LLP, counsel for the Underwriters, a memorandum or summary, (the “Blue Sky Survey”), in form and substance satisfactory to the Representatives, with respect to the qualification for offering and sale by the Underwriters of the Shares under the State securities or Blue Sky laws of such jurisdictions as the Representatives may reasonably have designated to the Company.

(h) The Representatives shall have received, on each of the date hereof, the Closing Date and, if applicable, the Option Closing Date, a letter dated the date hereof, the Closing Date or the Option Closing Date, as the case may be, in form and substance reasonably satisfactory to the Representatives, of McGladrey & Pullen, LLP and Deloitte & Touche LLP containing such statements and information as is ordinarily included in accountants’ “comfort letters” to underwriters with respect to the financial statements and certain financial information contained in the Registration Statement, the General Disclosure Package and the Prospectus; provided that the letter delivered on the Closing Date or the Option Closing Date, as the case may be, shall use a “cut-off” date no more than three business days prior to such Closing Date or such Option Closing Date, as the case may be.

(i) The Representatives shall have received on the Closing Date and, if applicable, the Option Closing Date, as the case may be, a certificate or certificates of the Chief Executive Officer and the Chief Financial Officer of the Company to the effect that, as of the Closing Date or the Option Closing Date, as the case may be, confirming as follows:

(i) The Registration Statement has become effective under the Act and no stop order suspending the effectiveness of the Registration Statement or no order preventing or suspending the use of any Preliminary Prospectus, any Issuer Free Writing Prospectus or the Prospectus has been issued, and no proceedings for such purpose or pursuant to Section 8A of the Act have been taken or are, to his or her knowledge, contemplated or threatened by the Commission;

(ii) The representations and warranties of the Company contained in Section 1 hereof are true and correct as of the Closing Date or the Option Closing Date, as the case may be;

(iii) All filings required to have been made by the Company pursuant to Rules 424, 430A, 430B or 430C under the Act have been made as and when required by such rules;

(iv) Such officers have carefully examined the General Disclosure Package and any individual Limited Use Free Writing Prospectus and, to the knowledge of such officers, as of the Applicable Time, the statements contained in the General Disclosure Package and any

individual Limited Use Free Writing Prospectus did not contain any untrue statement of a material fact, and such General Disclosure Package and any individual Limited Use Free Writing Prospectus, when considered together with the General Disclosure Package, did not omit to state a material fact necessary in order to make the statements therein, in the light of the circumstances under which they were made, not misleading;

(v) Such officers have carefully examined the Registration Statement and, to the knowledge of such officers, as of the effective date of the Registration Statement, the Registration Statement and any amendments thereto did not contain any untrue statement of a material fact and did not omit to state a material fact necessary in order to make the statements therein not misleading, and since the effective date of the Registration Statement, no event has occurred which should have been set forth in a supplement to or an amendment of the Prospectus which has not been so set forth in such supplement or amendment;

(vi) Such officers have carefully examined the Prospectus and, to the knowledge of such officers, as of its date and the Closing Date or the Option Closing Date, as the case may be, the Prospectus and any amendments and supplements thereto did not contain any untrue statement of a material fact and did not omit to state a material fact necessary in order to make the statements therein, in the light of the circumstances under which they were made, not misleading; and

(vii) Since the respective dates as of which information is given in the Registration Statement, the General Disclosure Package and the Prospectus, there has not been any development that has had or that would reasonably be expected to have a Material Adverse Effect, whether or not arising in the ordinary course of business.

(j) The Representatives shall have received on the Closing Date and, if applicable, the Option Closing Date, as the case may be, a certificate executed by or on behalf of the Selling Shareholders to the effect that, as of the Closing Date or the Option Closing Date, as the case may be, each of them severally confirms as follows:

(i) The representations and warranties of such Selling Shareholder contained in Section 1 hereof are true and correct as of the Closing Date or the Option Closing Date, as the case may be; and

(ii) Such Selling Shareholder has complied with all of the agreements and satisfied all of the conditions on its part to be performed or satisfied hereunder on or prior to such date.

(k) The Company and the Selling Shareholders shall have furnished to the Representatives such further certificates and documents confirming the representations and warranties, covenants and conditions contained herein and related matters as the Representatives may reasonably have requested. Any opinions and certificates delivered under this Section 6(k) shall be deemed to be in compliance with the provisions hereof only if they are in all material respects reasonably satisfactory to the Representatives.

(l) The Firm Shares and Option Shares, if any, have been approved for listing upon notice of issuance on the Nasdaq Global Market.

(m) The Representatives shall have received “lock-up” agreements, each substantially in the form attached hereto as Exhibit A, from each officer and director of the Company, each of the Selling Shareholders and each other stockholder and option holder of the Company listed on Schedule VI hereto, and each of such lock-up agreements shall be in full force and effect.

If any of the conditions hereinabove provided for in this Section 6 shall not have been fulfilled when and as required by this Agreement to be fulfilled, the obligations of the Underwriters hereunder may be terminated by the Representatives by notifying the Company and the Selling Shareholders of such termination in writing or by telegram at or prior to the Closing Date or the Option Closing Date, as the case may be.

In such event, the Selling Shareholders, the Company and the Underwriters shall not be under any obligation to each other (except to the extent provided in Sections 5 and 8 hereof).

7. CONDITIONS OF THE OBLIGATIONS OF THE SELLERS.

The obligations of the Sellers to sell and deliver the portion of the Shares required to be delivered as and when specified in this Agreement are subject to the conditions that at the Closing Date or the Option Closing Date, as the case may be, no stop order suspending the effectiveness of the Registration Statement shall have been issued and in effect or proceedings therefor initiated or threatened.

8. INDEMNIFICATION.

(a) The Company and each of the Subsidiaries jointly and severally agree:

(1) to indemnify and hold harmless each Underwriter, the directors and officers of each Underwriter and each person, if any, who controls any Underwriter within the meaning of either Section 15 of the Act or Section 20 of the Exchange Act, against any losses, claims, damages or liabilities to which such Underwriter or any such controlling person may become subject under the Act or otherwise, insofar as such losses, claims, damages or liabilities (or actions or proceedings in respect thereof) arise out of or are based upon (i) any untrue statement or alleged untrue statement of any material fact contained in the Registration Statement, any Preliminary Prospectus, any Issuer Free Writing Prospectus, the Prospectus or any amendment or supplement thereto, (ii) with respect to the Registration Statement or any amendment or supplement thereto, the omission or alleged omission to state therein a material fact necessary to make the statements therein not misleading or (iii) with respect to any Preliminary Prospectus, any Issuer Free Writing Prospectus, the Prospectus or any amendment or supplement thereto, the omission or alleged omission to state therein a material fact required to be stated therein or necessary to make the statements therein not misleading in the light of the circumstances under which they were made; provided, however, that the

Company and each of the Subsidiaries will not be liable in any such case to the extent that any such loss, claim, damage or liability arises out of or is based upon an untrue statement or alleged untrue statement, or omission or alleged omission made in the Registration Statement, any Preliminary Prospectus, any Issuer Free Writing Prospectus, the Prospectus, or such amendment or supplement, in reliance upon and in conformity with written information furnished to the Company by or through the Representatives specifically for use therein, it being understood and agreed that the only such information furnished by any Underwriter consists of the information described as such in Section 13 herein. The Company also agrees to indemnify and hold harmless DBSI, its directors and officers and each person, if any, who controls DBSI within the meaning of either Section 15 of the Act, or Section 20 of the Exchange Act, against any and all losses, claims, damages, liabilities and judgments incurred as a result of DBSI’s participation as a “qualified independent underwriter” within the meaning of Rule 2720 of the National Association of Securities Dealers’ Conduct Rules in connection with the offering of the Shares, except for any losses, claims, damages, liabilities and judgments resulting from DBSI’s, its directors’, officers’ or any such controlling person’s gross negligence or willful misconduct; and

(2) to reimburse each Underwriter, each Underwriter’s directors and officers, and each such controlling person upon demand for any legal or other out-of-pocket expenses reasonably incurred by such Underwriter or such controlling person in connection with investigating or defending any such loss, claim, damage or liability, action or proceeding or in responding to a subpoena or governmental inquiry related to the offering of the Shares, whether or not such Underwriter or controlling person is a party to any action or proceeding. In the event that it is finally judicially determined that the Underwriters were not entitled to receive payments for legal and other expenses pursuant to this subparagraph, the Underwriters will promptly return all sums that had been advanced pursuant hereto.

(b) Each of the Selling Shareholders agrees to indemnify and hold harmless each Underwriter, the directors and officers of each Underwriter and each person, if any, who controls any Underwriter within the meaning of either Section 15 of the Act or Section 20 of the Exchange Act, against any losses, claims, damages or liabilities to which such Underwriter or any such controlling person may become subject under the Act or otherwise, insofar as such losses, claims, damages or liabilities (or actions or proceedings in respect thereof) arise out of or are based upon (i) any untrue statement or alleged untrue statement of any material fact contained in the Registration Statement, any Preliminary Prospectus, any Issuer Free Writing Prospectus, the Prospectus or any amendment or supplement thereto, (ii) with respect to the Registration Statement or any amendment or supplement thereto, the omission or alleged omission to state therein a material fact required to be stated therein or necessary to make the statements therein not misleading or (iii) with respect to any Preliminary Prospectus, any Issuer Free Writing Prospectus, the Prospectus or any amendment or supplement thereto, the omission or alleged omission to state therein a material fact necessary to make the statements therein not misleading in the light of the circumstances under which they were made, but only to the extent that such losses, claims, damages or liabilities are finally judicially determined by a court of competent jurisdiction in a final, unappealable order to have resulted primarily from an untrue statement or alleged fact contained in or omitted from any information so furnished in writing by such Selling Shareholder expressly for use therein; provided, however, that

such Selling Shareholder will not be liable in any such case to the extent that any such loss, claim, damage or liability arises out of or is based upon an untrue statement or alleged untrue statement, or omission or alleged omission made in the Registration Statement, any Preliminary Prospectus, any Issuer Free Writing Prospectus, the Prospectus, or such amendment or supplement, in reliance upon and in conformity with written information furnished to the Company by or through the Representatives specifically for use therein, it being understood and agreed that the only such information furnished by any Underwriter consists of the information described as such in Section 13 herein. This indemnity agreement will be in addition to any liability that the Company may otherwise have.

(c) Each Underwriter severally and not jointly will indemnify and hold harmless the Company, each of its directors, each of its officers who have signed the Registration Statement, the Selling Shareholders, and each person, if any, who controls the Company or the Selling Shareholders within the meaning of Section 15 of the Act or Section 20 of the Exchange Act, against any losses, claims, damages or liabilities to which the Company or any such director, officer, Selling Shareholder or controlling person may become subject under the Act or otherwise, insofar as such losses, claims, damages or liabilities (or actions or proceedings in respect thereof) arise out of or are based upon (i) any untrue statement or alleged untrue statement of any material fact contained in the Registration Statement, any Preliminary Prospectus, any Issuer Free Writing Prospectus, the Prospectus or any amendment or supplement thereto, (ii) with respect to the Registration Statement or any amendment or supplement thereto, the omission or alleged omission to state therein a material fact required to be stated therein or necessary to make the statements therein not misleading or (iii) with respect to any Preliminary Prospectus, any Issuer Free Writing Prospectus, the Prospectus or any amendment or supplement thereto, the omission or alleged omission to state therein a material fact necessary to make the statements therein not misleading in the light of the circumstances under which they were made; and will reimburse any legal or other expenses reasonably incurred by the Company or any such director, officer, Selling Shareholder or controlling person in connection with investigating or defending any such loss, claim, damage, liability, action or proceeding; provided, however, that each Underwriter will be liable in each case to the extent, but only to the extent, that such untrue statement or alleged untrue statement or omission or alleged omission has been made in the Registration Statement, any Preliminary Prospectus, any Issuer Free Writing Prospectus, the Prospectus or such amendment or supplement, in reliance upon and in conformity with written information furnished to the Company by or through the Representatives specifically for use therein, it being understood and agreed that the only such information furnished by any Underwriter consists of the information described as such in Section 13 herein. This indemnity agreement will be in addition to any liability that such Underwriter may otherwise have.

(d) In case any proceeding (including any governmental investigation) shall be instituted involving any person in respect of which indemnity may be sought pursuant to this Section 8, such person (the “indemnified party”) shall promptly notify the person against whom such indemnity may be sought (the “indemnifying party”) in writing. No indemnification provided for in Section 8(a), (b) or (c) shall be available to any party who shall fail to give notice as provided

in this Section 8(d) if the party to whom notice was not given was unaware of the proceeding to which such notice would have related and was materially prejudiced by the failure to give such notice, but the failure to give such notice shall not relieve the indemnifying party or parties from any liability which it or they may have to the indemnified party for contribution or otherwise than on account of the provisions of Section 8(a), (b) or (c). In case any such proceeding shall be brought against any indemnified party and it shall notify the indemnifying party of the commencement thereof, the indemnifying party shall be entitled to participate therein and, to the extent that it shall wish, jointly with any other indemnifying party similarly notified, to assume the defense thereof, with counsel reasonably satisfactory to such indemnified party and shall pay as incurred the reasonable fees and disbursements of such counsel related to such proceeding. In any such proceeding, any indemnified party shall have the right to retain its own counsel at its own expense. Notwithstanding the foregoing, the indemnifying party shall pay as incurred (or within 30 days of presentation) the reasonable fees and expenses of the counsel retained by the indemnified party in the event (i) the indemnifying party and the indemnified party shall have mutually agreed to the retention of such counsel, (ii) the named parties to any such proceeding (including any impleaded parties) include both the indemnifying party and the indemnified party and representation of both parties by the same counsel would be inappropriate due to actual or potential differing interests between them or (iii) the indemnifying party shall have failed to assume the defense and employ counsel acceptable to the indemnified party within a reasonable period of time after notice of commencement of the action. It is understood that the indemnifying party shall not, in connection with any proceeding or related proceedings in the same jurisdiction, be liable for the reasonable fees and expenses of more than one separate firm for all such indemnified parties. Such firm shall be designated in writing by you in the case of parties indemnified pursuant to Section 8(a) or (b) and by the Company and the Selling Shareholders in the case of parties indemnified pursuant to Section 8(c). The indemnifying party shall not be liable for any settlement of any proceeding effected without its written consent but if settled with such consent or if there be a final judgment for the plaintiff, the indemnifying party agrees to indemnify the indemnified party from and against any loss or liability by reason of such settlement or judgment. In addition, the indemnifying party will not, without the prior written consent of the indemnified party, settle or compromise or consent to the entry of any judgment in any pending or threatened claim, action or proceeding of which indemnification may be sought hereunder (whether or not any indemnified party is an actual or potential party to such claim, action or proceeding) unless such settlement, compromise or consent includes an unconditional release of each indemnified party from all liability arising out of such claim, action or proceeding. Notwithstanding anything contained herein to the contrary, if indemnity may be sought pursuant to Section 8(a) hereof in respect of such action or proceeding, then in addition to such separate firm for the indemnified parties, the indemnifying party shall be liable for the reasonable fees and expenses of not more than one separate firm (in addition to any local counsel) for DBSI in its capacity as a “qualified independent underwriter” and all persons, if any, who control DBSI within the meaning of either Section 15 of the Act or Section 20 of the Exchange Act.

(e) To the extent the indemnification provided for in this Section 8 is unavailable to or insufficient to hold harmless an indemnified party under Section 8(a), (b) or (c) above in respect of any losses, claims, damages or liabilities (or actions or proceedings in respect thereof) referred to therein, then each indemnifying party shall contribute to the amount paid or payable by such

indemnified party as a result of such losses, claims, damages or liabilities (or actions or proceedings in respect thereof) in such proportion as is appropriate to reflect the relative benefits received by the Company, the Subsidiaries and the Selling Shareholders on the one hand and the Underwriters on the other from the offering of the Shares. If, however, the allocation provided by the immediately preceding sentence is not permitted by applicable law then each indemnifying party shall contribute to such amount paid or payable by such indemnified party in such proportion as is appropriate to reflect not only such relative benefits but also the relative fault of the Company, the Subsidiaries and the Selling Shareholders on the one hand and the Underwriters on the other in connection with the statements or omissions which resulted in such losses, claims, damages or liabilities (or actions or proceedings in respect thereof), as well as any other relevant equitable considerations. The relative benefits received by the Company and the Selling Shareholders on the one hand and the Underwriters on the other shall be deemed to be in the same proportion as the total net proceeds from the offering (before deducting expenses) received by the Company and the Selling Shareholders bear to the total underwriting discounts and commissions received by the Underwriters, in each case as set forth in the table on the cover page of the Prospectus. The relative fault shall be determined by reference to, among other things, whether the untrue or alleged untrue statement of a material fact or the omission or alleged omission to state a material fact relates to information supplied by the Company or the Selling Shareholders on the one hand or the Underwriters on the other and the parties’ relative intent, knowledge, access to information and opportunity to correct or prevent such statement or omission.

The Company, the Selling Shareholders and the Underwriters agree that it would not be just and equitable if contributions pursuant to this Section 8(e) were determined by pro rata allocation (even if the Underwriters were treated as one entity for such purpose) or by any other method of allocation which does not take account of the equitable considerations referred to above in this Section 8(e). The amount paid or payable by an indemnified party as a result of the losses, claims, damages or liabilities (or actions or proceedings in respect thereof) referred to above in this Section 8(e) shall be deemed to include any legal or other expenses reasonably incurred by such indemnified party in connection with investigating or defending any such action or claim. Notwithstanding the provisions of this Section 8(e), (i) no Underwriter shall be required to contribute any amount in excess of the underwriting discounts and commissions applicable to the Shares purchased by such Underwriter, (ii) no person guilty of fraudulent misrepresentation (within the meaning of Section 11(f) of the Act) shall be entitled to contribution from any person who was not guilty of such fraudulent misrepresentation, and (iii) no Selling Shareholder shall be required to contribute any amount in excess of the proceeds received by such Selling Shareholder from the Underwriters in the offering, nor shall it be required to contribute in any circumstance in which it would not have been required to indemnify had the indemnification been available or sufficient. The Underwriters’ obligations in this Section 8(e) to contribute are several in proportion to their respective underwriting obligations and not joint.

(f) In any proceeding relating to the Registration Statement, any Preliminary Prospectus, any Issuer Free Writing Prospectus, the Prospectus or any supplement or amendment thereto, each party against whom contribution may be sought under this Section 8 hereby consents to the jurisdiction of any court having jurisdiction over any other contributing party, agrees that process issuing from such court may be served upon it by any other contributing party and consents

to the service of such process and agrees that any other contributing party may join it as an additional defendant in any such proceeding in which such other contributing party is a party.

(g) Any losses, claims, damages, liabilities or expenses for which an indemnified party is entitled to indemnification or contribution under this Section 8 shall be paid by the indemnifying party to the indemnified party as such losses, claims, damages, liabilities or expenses are incurred. The indemnity and contribution agreements contained in this Section 8 and the representations and warranties of the Company and of the Selling Shareholders set forth in this Agreement shall remain operative and in full force and effect, regardless of (i) any investigation made by or on behalf of any Underwriter, its directors or officers or any person controlling any Underwriter, the Company, its directors or officers or any persons controlling the Company, each Selling Shareholder, its directors or officers or any persons controlling such Selling Shareholder, (ii) acceptance of any Shares and payment therefor hereunder, and (iii) any termination of this Agreement. A successor to any Underwriter, its directors or officers or any person controlling any Underwriter, or to the Company, its directors or officers, or any person controlling the Company, or to any Selling Shareholder, its directors or officers, or any person controlling the any Selling Shareholder shall be entitled to the benefits of the indemnity, contribution and reimbursement agreements contained in this Section 8.

9. DEFAULT BY UNDERWRITERS.

If on the Closing Date or the Option Closing Date, as the case may be, any Underwriter shall fail to purchase and pay for the portion of the Shares which such Underwriter has agreed to purchase and pay for on such date (otherwise than by reason of any default on the part of the Company or a Selling Shareholder), you, as Representatives of the Underwriters, shall use your reasonable efforts to procure within 36 hours thereafter one or more of the other Underwriters, or any others, to purchase from the Company and the Selling Shareholders such amounts as may be agreed upon and upon the terms set forth herein, the Shares that the defaulting Underwriter or Underwriters failed to purchase. If during such 36 hours you, as such Representatives, shall not have procured such other Underwriters, or any others, to purchase the Shares agreed to be purchased by the defaulting Underwriter or Underwriters, then (a) if the aggregate number of shares with respect to which such default shall occur does not exceed 10% of the Shares to be purchased on the Closing Date or the Option Closing date, as the case may be, the other Underwriters shall be obligated, severally, in proportion to the respective numbers of Shares which they are obligated to purchase hereunder, to purchase the Shares which such defaulting Underwriter or Underwriters failed to purchase, or (b) if the aggregate number of shares of Shares with respect to which such default shall occur exceeds 10% of the Shares to be purchased on the Closing Date or the Option Closing Date, as the case may be, the Company and the Selling Shareholders or you as the Representatives of the Underwriters will have the right, by written notice given within the next 36-hour period to the parties to this Agreement, to terminate this Agreement without liability on the part of the non-defaulting Underwriters or of the Company or of the Selling Shareholders except to the extent provided in Sections 5 and 8 hereof. In the event of a default by any Underwriter or Underwriters, as set forth in this Section 9, the Closing Date or Option Closing Date, as the case may be, may be postponed for such period, not exceeding seven days, as you, as Representatives, may determine in order that the required changes in the Registration Statement, the General

Disclosure Package or in the Prospectus or in any other documents or arrangements may be effected. The term “Underwriter” includes any person substituted for a defaulting Underwriter. Any action taken under this Section 9 shall not relieve any defaulting Underwriter from liability in respect of any default of such Underwriter under this Agreement.

10. NOTICES.

All communications hereunder shall be in writing and, except as otherwise provided herein, will be mailed, delivered, telecopied or telegraphed and confirmed as follows:

if to the Underwriters, to:

Deutsche Bank Securities Inc.

60 Wall Street, 4^th Floor

New York, New York 10005

Attention: Syndicate Manager

with a copy to:

Deutsche Bank Securities Inc.

60 Wall Street

New York, New York 10005

Attention: General Counsel

and to:

Jefferies & Company, Inc.

520 Madison Avenue

New York, New York 10022

Attention: General Counsel

if to the Company, to:

McLeodUSA Incorporated

One Martha’s Way

Hiawatha, Iowa 52233

Attention: General Counsel

with a copy to:

Wilmer Cutler Pickering Hale and Dorr LLP

60 State Street

Boston, Massachusetts 02109

Attention: David A. Westenberg

and if to the Selling Shareholders, to:

Ropes & Gray LLP

One International Place

Boston, Massachusetts 02110

Attention: Keith F. Higgins

11. TERMINATION.

This Agreement may be terminated by you by notice to the Sellers (a) at any time prior to the Closing Date or any Option Closing Date (if different from the Closing Date and then only as to Option Shares) if any of the following has occurred: (i) since the respective dates as of which information is given in the Registration Statement, the General Disclosure Package and the Prospectus, any material adverse change or any development involving a prospective material adverse change in or affecting the earnings, business, management, properties, assets, rights, operations, condition (financial or otherwise) or prospects of the Company and the Subsidiaries taken as a whole, whether or not arising in the ordinary course of business, (ii) any outbreak or escalation of hostilities or declaration of war or national emergency or other national or international calamity or crisis (including, without limitation, an act of terrorism) or material change in economic or political conditions if the effect of such outbreak, escalation, declaration, emergency, calamity, crisis or change on the financial markets of the United States would, in your judgment, materially impair the investment quality of the Securities, or (iii) suspension of trading in securities generally on the New York Stock Exchange, the American Stock Exchange or the Nasdaq Global Market or limitation on prices (other than limitations on hours or numbers of days of trading) for securities on either such Exchange, (iv) the enactment, publication, decree or other promulgation of any statute, regulation, rule or order of any court or other governmental authority which in your opinion materially and adversely affects or may materially and adversely affect the business or operations of the Company, (v) the declaration of a banking moratorium by United States or New York State authorities, (vi) any downgrading, or placement on any watch list for possible downgrading, in the rating of any of the Company’s debt securities by any “nationally recognized statistical rating organization” (as defined for purposes of Rule 436(g) under the Exchange Act); (vii) the suspension of trading of the Common Stock by the Nasdaq Global Market or the Commission, or any other governmental authority or, (viii) the taking of any action by any governmental body or agency in respect of its monetary or fiscal affairs which in your reasonable opinion has a material adverse effect on the securities markets in the United States; or (b) as provided in Sections 6 and 9 of this Agreement.

12. SUCCESSORS.

This Agreement has been and is made solely for the benefit of the Underwriters, the Company and the Selling Shareholders and their respective successors, executors, administrators, heirs and assigns, and the officers, directors and controlling persons referred to herein, and no other person will have any right or obligation hereunder. No purchaser of any of the Shares from any Underwriter shall be deemed a successor or assign merely because of such purchase.

13. INFORMATION PROVIDED BY UNDERWRITERS.

The Company, the Selling Shareholders and the Underwriters acknowledge and agree that the only information furnished or to be furnished by any Underwriter to the Company for inclusion in the Registration Statement, any Preliminary Prospectus, any Issuer Free Writing Prospectus or the Prospectus consists of the concession and reallowance figures appearing in the third paragraph under the caption “Underwriting” in the Prospectus, the information regarding discretionary sales appearing in the ninth paragraph under the caption “Underwriting” in the Prospectus and the information set forth in the tenth through sixteenth, nineteenth and twentieth paragraphs under the caption “Underwriting” in the Prospectus, and includes any information furnished by the Underwriters for inclusion in any Issuer Free Writing Prospectus.

14. MISCELLANEOUS.

The reimbursement, indemnification and contribution agreements contained in this Agreement and the representations, warranties and covenants in this Agreement shall remain in full force and effect regardless of (a) any termination of this Agreement, (b) any investigation made by or on behalf of any Underwriter or controlling person thereof, or by or on behalf of the Company or its directors or officers or any Selling Shareholder or controlling person thereof, as the case may be, and (c) delivery of and payment for the Shares under this Agreement.

The Company and the Selling Shareholders acknowledge and agree that each Underwriter in providing investment banking services to the Company and the Selling Shareholders in connection with the offering, including in acting pursuant to the terms of this Agreement, has acted and is acting as an independent contractor and not as a fiduciary and the Company and the Selling Shareholders do not intend such Underwriter to act in any capacity other than as an independent contractor, including as a fiduciary or in any other position of higher trust.

This Agreement may be executed in two or more counterparts, each of which shall be deemed an original, but all of which together shall constitute one and the same instrument.

This Agreement shall be governed by, and construed in accordance with, the law of the State of New York, including, without limitation, Section 5-1401 of the New York General Obligations Law.

The Underwriters, on the one hand, and the Company (on its own behalf and, to the extent permitted by law, on behalf of its stockholders), on the other hand, waive any right to trial by jury in any action, claim, suit or proceeding with respect to the your engagement as underwriter or your role in connection herewith.

If the foregoing letter is in accordance with your understanding of our agreement, please sign and return to us the enclosed duplicates hereof, whereupon it will become a binding agreement among the Selling Shareholders, the Company and the several Underwriters in accordance with its terms.

Any person executing and delivering this Agreement as Attorney-in-Fact for a Selling Shareholder represents by so doing that he has been duly appointed as Attorney-in-Fact by such Selling Shareholder pursuant to a validly existing and binding Power of Attorney that authorizes such Attorney-in-Fact to take such action.

		Very truly yours,

		MCLEODUSA INCORPORATED

		By
			Joseph H. Ceryanec
			Chief Financial Officer

		Selling Shareholders listed on Schedule II

		By
			Attorney-in-Fact


The foregoing Underwriting Agreement
is hereby confirmed and accepted as
of the date first above written.

DEUTSCHE BANK SECURITIES INC.
JEFFERIES & COMPANY, INC.

As Representatives of the several
Underwriters listed on Schedule I

By: Deutsche Bank Securities Inc.

By
	Authorized Officer

By
	Authorized Officer


By: Jefferies & Company, Inc.

By
	Authorized Officer

By
	Authorized Officer

SCHEDULE I

SCHEDULE OF UNDERWRITERS

		Number of Firm Shares
Underwriter		to be Purchased

Deutsche Bank Securities Inc.

Jefferies & Company, Inc.

CIBC World Markets Corp.

Raymond James & Associates, Inc.

Thomas Weisel Partners LLC



Total

SCHEDULE II

SCHEDULE OF SELLING SHAREHOLDERS

		Number of Firm Shares
Selling Shareholder		to be Sold





Total

SCHEDULE III

SCHEDULE OF OPTION SHARES

	Maximum Number	Percentage of
	of Option Shares	Total Number of
Name of Seller	to be Sold	Option Shares





Total		100	%

SCHEDULE IV

[Price and other terms of the offering conveyed orally]

SCHEDULE V

[List each Issuer Free Writing Prospectus to be included in the General Disclosure Package including Final Term Sheet]

SCHEDULE VI

[Insert list of lock-up signatories]

EXHIBIT A

FORM OF LOCK-UP AGREEMENT

, 2007

McLeodUSA Incorporated

One Martha’s Way

Hiawatha, IA 52233

Deutsche Bank Securities Inc.

Jefferies & Company, Inc.

As Representatives of the

Several Underwriters

c/o Deutsche Bank Securities Inc.

60 Wall Street, 4^th Floor

New York, New York 10005

Ladies and Gentlemen:

The undersigned understands that Deutsche Bank Securities Inc. and Jefferies & Company, Inc., as representatives (the “Representatives”) of the several underwriters (the “Underwriters”), propose to enter into an Underwriting Agreement (the “Underwriting Agreement”) with McLeodUSA Incorporated (the “Company”), providing for the public offering by the Underwriters, including the Representatives, of common stock, par value $0.01 (the “Common Stock”), of the Company (the “Public Offering”).

To induce the Underwriters that may participate in the Public Offering to continue their efforts in connection with the Public Offering, the undersigned agrees that, without the prior written consent of the Representatives, the undersigned will not, directly or indirectly, offer, sell, pledge, contract to sell (including any short sale), grant any option to purchase or otherwise dispose of any shares of Common Stock (including, without limitation, shares of Common Stock of the Company which may be deemed to be beneficially owned by the undersigned on the date hereof in accordance with the rules and regulations of the Securities and Exchange Commission, shares of Common Stock which may be issued upon exercise of a stock option or warrant and any other security convertible into or exchangeable for Common Stock) or enter into any Hedging Transaction (as defined below) relating to the Common Stock (each of the foregoing referred to as a “Disposition”) during the period specified in the following paragraph (the “Lock-Up Period”). The foregoing restriction is expressly intended to preclude the undersigned from engaging in any Hedging Transaction or other transaction which is designed to or reasonably expected to lead to or result in a Disposition during the Lock-Up Period even if the securities would be disposed of by someone other than the undersigned. “Hedging Transaction” means any short sale (whether or not against the box) or any purchase, sale or grant of any right (including, without limitation, any put or call

option) with respect to any security (other than a broad-based market basket or index) that includes, relates to or derives any significant part of its value from the Common Stock.

The initial Lock-Up Period will commence on the date hereof and continue until, and include, the date that is 180 days after the date of the final prospectus relating to the Public Offering (the “Initial Lock-Up Period”); provided, however, that if (1) during the last 17 days of the Initial Lock-Up Period, (A) the Company releases earnings results or (B) material news or a material event relating to the Company occurs, or (2) prior to the expiration of the Initial Lock-Up Period, the Company announces that it will release earnings results during the 16-day period following the last day of the Initial Lock-Up Period, then in each case the Lock-Up Period will be extended until the expiration of the 18-day period beginning on the date of the release of the earnings results or the occurrence of material news or a material event relating to the Company, as the case may be, unless the Representatives waive, in writing, such extension.

Notwithstanding the foregoing, the undersigned may transfer (a) shares of Common Stock to the Underwriters in the Public Offering, (b) shares of Common Stock acquired in open market transactions by the undersigned after the completion of the Public Offering, and (c) any or all of the shares of Common Stock if the transfer is (i) by gift, will or intestacy, (ii) to any trust, family limited partnership or family limited liability company for the direct or indirect exclusive benefit of the undersigned and/or the immediate family of the undersigned, (iii) by distribution to partners, members or shareholders of the undersigned, or (iv) to an “affiliate” (as defined in Rule 501 under the Securities Act of 1933, as amended) of the undersigned; provided, however, that in the case of a transfer pursuant to clause (c) above, it shall be a condition to the transfer that the transferee execute an agreement stating that the transferee is receiving and holding the shares of Common Stock subject to the provisions of this Lock-Up Agreement. For purposes of this paragraph, the term “immediate family,” shall mean any child, stepchild, grandchild, parent, stepparent, grandparent, spouse, sibling, mother-in-law, father-in-law, son-in-law, daughter-in-law, brother-in-law, or sister-in-law, and shall include adoptive relationships.

The undersigned agrees that the Company may, and that the undersigned will, (i) with respect to any shares of Common Stock for which the undersigned is the record holder, cause the transfer agent for the Company to note stop transfer instructions with respect to such shares of Common Stock on the transfer books and records of the Company and (ii) with respect to any shares of Common Stock for which the undersigned is the beneficial holder but not the record holder, cause the record holder of such shares of Common Stock to cause the transfer agent for the Company to note stop transfer instructions with respect to such shares of Common Stock on the transfer books and records of the Company.

In addition, the undersigned hereby waives any and all notice requirements and rights with respect to registration of securities pursuant to any agreement, understanding or otherwise setting forth the terms of any security of the Company held by the undersigned, including any registration rights agreement to which the undersigned and the Company may be party; provided that such waiver shall apply only to the proposed Public Offering, and any other action taken by the Company in connection with the proposed Public Offering.

The undersigned hereby agrees that, to the extent that the terms of this Lock-Up Agreement conflict with or are in any way inconsistent with any registration rights agreement to which the undersigned and the Company may be a party, this Lock-Up Agreement supersedes such registration rights agreement.

The undersigned hereby represents and warrants that the undersigned has full power and authority to enter into this Lock-Up Agreement. All authority herein conferred or agreed to be conferred shall survive the death or incapacity of the undersigned and any obligations of the undersigned shall be binding upon the heirs, personal representatives, successors and assigns of the undersigned.

Notwithstanding anything herein to the contrary, this agreement shall be of no further force or effect on the earlier to occur of (i) January 31, 2008, if the closing of the Public Offering has not occurred prior to that date, or (ii) at such time as the Company withdraws the registration statement filed in connection with the Public Offering.

	Signature:

	Print Name:

McLeodUSA INC S-1/A