EXHIBIT 99.1

JOINT FILER INFORMATION

Name:
BankAmerica Investment Corporation

231 So. LaSalle Street

Chicago, IL 60679

Designated Filer:
Bank of America Corporation

Issuer and

Ticker Symbol:
CMGI, Inc. (CMGI)

Date of Event

Requiring Statement:
August 2, 2004

Signature:
BANKAMERICA INVESTMENT CORPORATION

By: /s/ Julie Kunetka

Julie Kunetka

Senior Vice President - Legal

Name:
Abegail L. Moore Trust dated June 5, 1996

c/o Fleet National Bank

175 Federal Street, 10^th Floor

Boston, MA 02110

Designated Filer:
Bank of America Corporation

Issuer and

Ticker Symbol:
CMGI, Inc. (CMGI)

Date of Event

Requiring Statement:
August 2, 2004

Signature:
Abegail L. Moore Trust dated June 5, 1996

By: Fleet National Bank, as Trustee

By: /s/ Kevin O'Shea

Kevin O'Shea

Vice President

Name:
Alexander S. Moore Trust dated June 5, 1996

c/o Fleet National Bank

175 Federal Street, 10^th Floor

Boston, MA 02110

Designated Filer:
Bank of America Corporation

Issuer and

Ticker Symbol:
CMGI, Inc. (CMGI)

Date of Event

Requiring Statement:
August 2, 2004

Signature:
alexander s.. Moore Trust dated June 5, 1996

By: Fleet National Bank, as Trustee

By: /s/ Kevin O'Shea

Kevin O'Shea

Vice President

Name:
Fleet National Bank

175 Federal Street, 10^th Floor

Boston, MA 02110

Designated Filer:
Bank of America Corporation

Issuer and

Ticker Symbol:
CMGI, Inc. (CMGI)

Date of Event

Requiring Statement:
August 2, 2004

Signature:
fleet national bank

By: /s/ Kevin O'Shea

Kevin O'Shea

Vice President

BANKAMERICA INVESTMENT CORP 3