AdForce Means Business -- Achieves Best System Performance in Internet Ad Technology Industry.

Business Editors/High-Tech Writers

CUPERTINO, Calif.--(BUSINESS WIRE)--Nov. 13, 2000

AdForce Maintains 99.999% Uptime for Past Six Month Period, Delivers

Impressions Significantly Faster than Major Competitors

AdForce, Inc., a wholly owned subsidiary of CMGion and a leading online provider of centralized, outsourced ad management and delivery services, today announced that it has achieved virtually perfect system availability in the previous six month period. With an average ad delivery uptime of 99.999%, AdForce's customers can count on their sponsorship-based business running at full capacity. AdForce's current average impression delivery speed has been recorded at less than 0.5 seconds, significantly faster than its major competitors.

AdForce's stellar system performance is supported by an extensive global ad serving architecture, enhanced considerably by strategic relationships with Akamai and Digital Island that effectively augment AdForce's infrastructure with 2,000 additional servers located in over 100 countries.

"Our distributed architecture has enabled us to achieve the best system performance in our industry," said Harish Rao, chief technology officer of AdForce. "We count among our customer base some of the most heavily trafficked sites, portals and ad networks on the Internet. Our ad delivery and management technology has scaled seamlessly in the face of our customers' dramatic growth, while maintaining the system availability that they depend on."

To report performance speed analysis on its technology, AdForce relies on Keynote, the world's leading supplier of Internet performance measurement, diagnostic and consulting services to companies with e-commerce websites. Keynote is based on an extensive network of strategically located customizable software measurement agents. This network is connected to the major Internet backbones in dozens of metropolitan areas worldwide and also includes a sophisticated operations center for collecting, analyzing and disseminating Internet performance data. Keynote reports show that AdForce consistently delivers ads faster than the Keynote Business 40 and other ad serving providers. From May 2000 through the present, AdForce averaged a 0.42 second response time for ad delivery.

"Keynote's Internet performance measurement services show that AdForce often serves ads faster than websites can load pages," says Gene Shklar, vice president of public services at Keynote.

AdForce's industry leading performance is a tribute to the company's technology focus. AdForce has developed the most versatile digital advertising infrastructure in the world, and technological superiority has allowed the company to take the lead in digital marketing beyond the PC-based Internet. As part of the AdForce EveryWhere program, AdForce can deliver and manage electronic promotions to a broad range of digital media, including cell phones, personal digital assistants, interactive television portals, kiosks, point of sale devices and consumer electronic devices.

"We are extremely proud of our technology and our industry leading system performance," said Chuck Berger, CEO of AdForce. "AdForce's customers can concentrate on their core competencies, knowing that AdForce's primary concern is to provide them with the most customizable, efficient and reliable digital ad management and delivery service available in our industry."

About AdForce EveryWhere

AdForce EveryWhere is a new media advertising program to deliver targeted, interactive advertising messages to new digital platforms beyond the PC, including wireless, interactive television, broadband devices, kiosk, point-of-sale environments. The service provides digital content providers, ad networks, advertisers and agencies with innovative marketing options for delivering advertising and promotional content, thereby creating new opportunities for increasing revenues for partners, customers and future prospects. AdForce EveryWhere enables advertisers to reach the digital audience in any medium with a single creative theme, and effectively creates and sustains a revenue model to support the distribution of digitized content.

About AdForce (www.adforce.com)

AdForce Inc., a wholly owned subsidiary of CMGion, is the Force in Digital Marketing(TM) and a leading provider of centralized advertising services, enabling online publishers, rep firms and advertisers to leverage the unique advantages of the Internet as the first fully interactive medium. Deploying advanced scalable technology and backed by robust data centers, the AdForce service delivers billions of impressions monthly for some of the Internet's most prominent advertisers. AdForce provides a comprehensive suite of products, which allow advertisers and publishers to target, deliver, measure and analyze Internet advertising programs for the best results. AdForce has offices in Cupertino, CA, Costa Mesa, CA, New York, NY, Europe and Hong Kong. CMGion is a majority owned operating company of CMGI, Inc. For additional information, see http://www.adforce.com.

AdForce, the AdForce logo, AdForce EveryWhere and Force in Digital Marketing are trademarks of AdForce, Inc. All other products and services mentioned may be trademarks or service marks of their respective owners.

This release contains forward-looking statements which address a variety of subjects including, for example, the expected benefits, features and functionality of the AdForce EveryWhere. The following important factors and uncertainties, among others, could cause actual results to differ materially from those described in these forward-looking statements: AdForce's products and technologies may not successfully interoperate with those of third parties; adoption of new laws and regulations affecting the provision of Internet advertising services, including laws and regulations covering privacy, pricing and content; AdForce's success depends on the advertising needs of its customers and the continued demand for Internet advertising in general; and increased competition and technological changes in the markets in which AdForce competes. For a detailed discussion of these and other cautionary statements, please refer to CMGI's filings with the Securities and Exchange Commission, including CMGI's Annual Report on Form 10-K for the most recently ended fiscal year.