1stUp.com Launches Macintosh-Compatible Free Internet Access With Leading Portals.

Business Editors, High-Tech Writers

SAN FRANCISCO--(BUSINESS WIRE)--June 5, 2000

AltaVista and Lycos Make 1stUp's Software Available to Millions

Users in Largest Distribution of Macintosh Free Access to Date

1stUp.com, a leading provider of private label Internet access solutions and innovative web-advertising technology, today announced a Macintosh-compatible free Internet access service that is immediately available through AltaVista and Lycos.

Today's announcement marks the largest distribution effort to date of Macintosh free access in the U.S., with availability to end-users in 95% of the US and Canada, across 1stUp.com's dial-up network, the largest in North America with over 4,000 dial-up numbers.

The Macintosh-compatible access offering, powered by 1stUp.com Corporation, a majority-owned operating company of CMGI, Inc. (Nasdaq:CMGI), supplements 1stUp.com's already extensive array of private label access offerings currently in use by over 100 consumer brands. Each will soon launch their own versions of the 1stUp.com Macintosh-compatible access offering.

"We are very excited to enable our distribution partners to offer their consumers free Macintosh-compatible access to the Internet," remarked Charles Katz, president and CEO of 1stUp.com. "Just as users can select quality content and services from each of these leading Web sites, they now can select a reliable, Mac-compatible Internet service that integrates the unique content of these leading sites alongside the 1stUp.com access technology."

As with 1stUp.com's PC-compatible free access, Mac users will receive free access in exchange for keeping 1stUp.com's small, dockable navigation bar on the screen for the duration of the online session. At less than 900k, the downloadable software is the smallest Macintosh application for free access available -- allowing for quick, easy download or distribution on floppy disc or CD. The application is compatible with all Macs with MacOS 8.1 or higher and Internet Explorer 3.0 or higher or Netscape Navigator 3.0 or higher. The new service will be rolled out immediately through AltaVista and Lycos in the U.S. and Canada and is available for quick and easy download at www.altavista.com and www.lycos.com.

1stUp Internet Access Services

1stUp.com provides companies with a complete, private label Internet access solution to customize for their consumers. The 1stUp.com solution features a reliable, nationwide ISP network, customer support, e-mail, voicemail, webstorage, as well as 1stUp.com's patent-pending access technology. 1stUp.com currently offers its distribution partners tiered Internet access options including free and fee-based services.

The company recently announced the addition of a partner-branded, fee-based dial-up and broadband Internet services that are free of ever-present banner advertisements. Through these services, 1stUp.com now allows its distribution partners to establish a constant online connection with consumers or employees by offering a fee-based private label Internet access service in addition to 1stUp.com's popular, sponsor-supported free access offering.

About 1stUp.com

1stUp.com, a majority-owned operating company of CMGI, Inc., is a market leader in providing online and offline brand names with private label Internet access solutions and innovative advertising technology. 1stUp.com's patent-pending technology enables its distribution partners to brand, market and distribute free and cost-effective Internet services to their customers. Multiple leading ISPs support 1stUp.com's extensive ISP network to provide reliable connectivity.

The 1stUp.com network is the largest in North America based on total dial-up numbers and delivers reliable Internet access to over 95 percent of the U.S. and Canada. 1stUp.com powers Internet access solutions for leading brands like AltaVista, Excite@Home, Lycos, Gratis1 by StarMedia, and more than 100 additional brands. By aggregating the over 3.5 million registered subscribers of its distribution partners, 1stUp.com is able to pass along the benefits of optimal connectivity costs and advertising revenues to those companies.

For more information, visit www.1stup.com. 1stUp.com Corporation is located at 575 Market St., Suite 1000, San Francisco, CA 94105. Telephone: [phone].

This release contains forward-looking statements that address a variety of subjects including, for example, the expected benefits, functionality and availability of 1stUp's Macintosh-compatible free internet access products and related services. The following important factors and uncertainties, among others, could cause actual results to differ materially from those described in these forward-looking statements: 1stUp's products and technologies may not successfully interoperate with those of third parties; 1stUp's business model is dependent upon advertising and may be adversely affected by the adoption of new laws and regulations affecting the provision of Internet advertising services, including laws and regulations covering privacy, pricing and content; and increased competition and technological changes in the markets in which 1stUp 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.

1stUp and 1stUp.com are trademarks of 1stUp.com Corporation. All other products and services mentioned may be trademarks or service marks of their respective owners.