AdForce and iVAST Partner to Stream Targeted Rich Media Advertisements Over Broadband.

Business Editors/High-Tech Writers

Streaming Media West

SAN JOSE, Calif.--(BUSINESS WIRE)--Dec. 12, 2000

iVAST's MPEG-4 Based Platform Allows AdForce to Deliver Digital

Ads That Combine Video, Advanced Audio, 2D/3D Graphics,

Animation and Interactivity

AdForce Inc., a wholly owned subsidiary of CMGion and a leading online provider of centralized, outsourced ad management and delivery services, today announced an agreement with iVAST, a leading developer of interactive streaming media technologies based on MPEG-4, to stream interactive advertisements that can include high quality video/audio, 2D/3D graphics and animation components. With the iVAST platform, AdForce will also be able to offer clients sophisticated product placement capabilities.

AdForce is the first digital ad management company to leverage iVAST's multi-layered object oriented media platform. iVAST's platform provides a complete end-to-end streaming media environment, enabling AdForce to better profile, target and serve rich media promotions. The platform also allows AdForce to deliver these targeted, rich media promotion to end-user PCs, next-generation set-top boxes, games consoles and wireless consumer electronics products over broadband networks.

"Digital advertising must evolve to continue engaging the audience," said Chuck Berger, chief executive officer of AdForce. "Innovative companies have already recognized this and taken action to incorporate higher quality, interactive video advertisements into their online advertising strategies. At AdForce, we are dedicated to making this evolution happen. Partnering with iVAST -- a company that is building next generation media streaming technology -- will significantly expedite our progress."

iVAST is developing a unique combination of software, services and applications based upon the MPEG-4 standard -- the international standard specifically crafted to optimize the delivery of interactive media content over broadband IP networks. Using the MPEG-4 standard, iVAST has developed technology that allows advertisers to author MPEG-4 content once and deliver it over multiple networks and to a wide variety of consumer appliances.

"This is the first opportunity to deliver a breakthrough MPEG-4 based advertisement that offers a complete brand experience to consumers," said iVAST Chief Executive Officer Elliot Broadwin. "We expect that the distinct look-and-feel from the integration of audio, video, 2D/3D graphics and interactivity will make these promotions more engaging to viewers and ultimately lead to greater return on the advertiser's dollar. With iVAST's progressive content delivery platform and AdForce's record-setting delivery times, advertisers can enjoy an efficient and reliable solution for digital advertising over broadband Internet."

AdForce maintains the largest independent centralized ad serving platform in the world, and offers web publishers, advertisers and agencies industry leading versatility and system performance. AdForce's current average impression delivery speed has been recorded at less than 0.5 seconds more than 50 percent faster than its nearest competitor. AdForce's system performance is supported by an extensive global ad serving architecture, enhanced by strategic relationships with Akamai and Digital Island that augment AdForce's infrastructure with 2,000 additional servers located in more than 100 countries.

About iVAST Inc. (www.ivast.com)

iVAST Inc. is a leading developer of interactive streaming media technologies based on MPEG-4. iVAST is implementing this next generation technology to enable content owners and broadband access providers to expand brand reach, derive new revenues, and deliver enhanced rich media experiences to a wide range of end-user devices, including PCs, set-tops boxes, game consoles and personal digital assistants. Founded in 1998, iVAST has been at the forefront of MPEG-4 -- an international standard for interactive audio, video, 2D and 3D graphics content delivery over broadband IP networks. Backed by investors including Bell Canada, Centennial Ventures, Flying Rhinoceros Inc., Matsushita Electric Corporation of America, North River Ventures, Vanguard Venture Partners, Venture Strategy and Vulcan Ventures Inc., iVAST is headquartered in Santa Clara, California and offers creative services through its Studio in Los Angeles. For more information, please visit www.ivast.com.

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 online advertising services, enabling 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. For additional information see http://www.adforce.com.

This release contains forward-looking statements which address a variety of subjects including, for example, the expected benefits, features, functionality and availability of the combined offering of AdForce and iVAST and the expected interoperability of the technologies and products of AdForce with those of iVAST. 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 and iVAST's products and technologies may not successfully interoperate with each other or with the products of other 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.

Note to Editors: AdForce, the AdForce logo 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.