1stUp.com Announces Wholesale Agreement with AT&T Canada to Support Internet Access Offerings in Canada.

Business/Technology Editors

SAN FRANCISCO--(BUSINESS WIRE)--Jan. 19, 2000

Agreement Supports 1stUp.com's Free Ad-Supported Access Offerings and

Expands Availability of 1stUp.com's Service Throughout Canada

1stUp.com Corporation, a leading provider of ad-supported Internet access solutions and a majority-owned operating company of CMGI, Inc. (NASDAQ:CMGI), today announced that it has entered into an agreement with AT&T Canada (NASDAQ:ATTC and TSE:TEL.B), Canada's largest facilities-based competitive provider of local and long distance voice, data and Internet communications services. The wholesale agreement will further extend 1stUp.com's free ad-supported Internet access network in Canada.

1stUp.com powers leading ad-supported free access offerings, including AltaVista FreeAccess and FreeWorld by Excite@Home. AT&T Canada's network -- the most advanced competitive local and long haul broadband network in Canada --adds a vast new pool of Internet dial-up numbers in Canada that are available to 1stUp.com-affiliated users.

"Our wholesale relationship with AT&T Canada significantly increases the reach of our ISP presence to extensive coverage in Canada, and confirms that the free-access trend is spreading throughout the global village," said Charles Katz, president and CEO of 1stUp.com. "We look forward to expanding our international partnerships to achieve our company's goal: enabling Internet users worldwide to access the web--for free."

"This agreement will allow 1stUp.com, through their relationship with AltaVista, to leverage our high-quality Internet access and transport networks across Canada," said Ron Close, president, AT&T Canada Internet and E-Business Services. "We are pleased that 1stUp.com has selected AT&T Canada as their wholesale network supplier in Canada, as they bring more Canadians onto the Internet through our reliable, country-wide networks."

AT&T Canada's high performance fiber-optic local and long haul networks span more than 15,000 kilometers across Canada. This agreement will give 1stUp.com access to state-of-the-art local dial-up connections from nearly all Canadian centers at speeds of up to 56 Kpbs (V.90), as well as dial-up ISDN, with fiber-optic T3 and T1 lines connected by the latest ATM switching and high-speed routing equipment.

1stUp.com offers leading consumer-oriented companies complete technical and business solutions for delivering free, ad-supported Internet access to their customers. Users keep a small, sponsored navigation bar on their screen for the duration of their online sessions, in exchange for free, Internet access, now virtually anywhere in the U.S. and Canada.

About 1stUp.com

1stUp.com, a majority-owned operating company of CMGI, Inc. (NASDAQ:CMGI), is the market leader in providing consumer-oriented businesses with ad-supported Internet access solutions. 1stUp.com provides patent-pending technology that enables its partners to brand, market and distribute leading edge, cost-effective Internet services to their customers. The 1stUp.com solution enables consumers to receive unlimited, free Internet access in exchange for keeping a compact, sponsor-oriented navigation bar on their computer screen. Multiple leading ISPs support 1stUp.com's premium network, which delivers free, reliable Internet access to over 90 percent of the U.S. and Canada. Aggregating the end-user bases of AltaVista, Excite@Home, and additional partners, 1stup.com has the buying power of multiple brands and is able to pass along the benefits of optimal connectivity costs and advertising revenues to its partners.

1stUp.com Corporation is located at 88 Kearny Street, Suite 800 San Francisco, CA 94108. Telephone: [phone]. Additional information is available on the company's Web site at: www.1stup.com.

About AT&T Canada

AT&T Canada is Canada's largest facilities-based competitive voice, data and Internet telecommunications provider. Created in June 1999 from the merger of AT&T Canada Long Distance Services, MetroNet Communications, Netcom Canada and ACC TelEnterprises, AT&T Canada brings together the country's largest competitive local exchange carrier (CLEC), three of Canada's leading competitive Internet Service Providers (ISP), and Canada's pioneer in competitive long distance. Deploying the most advanced fibre-optic networking and digital switching platforms, AT&T Canada offers customers across the country a full suite of local and long distance voice, data and Internet services - with excellent customer service, competitive pricing, and sales and service locations from coast-to-coast. AT&T Canada is a public company which trades on the Toronto stock exchange under the symbol TEL.B and on the NASDAQ National Market System under the symbol ATTC. Visit AT&T Canada's web site, www.attcanada.com, for more information about the company.

About CMGI

With 60 companies, CMGI, Inc. (Nasdaq:CMGI) represents the largest, most diverse network of Internet companies in the world. This network includes both CMGI operating companies and a growing number of synergistic investments through its venture capital affiliate, @Ventures. CMGI leverages the technologies, content and market reach of its extended family of companies to foster rapid growth and industry leadership across its network, and the larger Internet Economy. Compaq, Intel, Microsoft, Pacific Century CyberWorks and Sumitomo hold minority positions in CMGI.

CMGI's majority-owned operating companies include Engage Technologies (Nasdaq:ENGA), NaviSite (Nasdaq:NAVI), 1ClickBrands, 1stUp.com, Activate.net, Activerse, AdForce, Adsmart, AltaVista, CMGI Solutions, Flycast, iCAST, Magnitude Network, MyWay.com, NaviNet, SalesLink, Tribal Voice and ZineZone. The company's @Ventures affiliates have ownership interests in Lycos, Inc. (Nasdaq:LCOS), Critical Path (Nasdaq:CPTH), Silknet (Nasdaq:SILK), Chemdex (Nasdaq:CMDX), MotherNature.com (Nasdaq:MTHR), Asimba.com, AuctionWatch.com, Aureate Media, blaxxun, BizBuyer.com, Boatscape.com, buyersedge.com, CarParts.com, CraftShop.com, eCircles.com, eGroups.com, EXP.com, FindLaw, FoodBuy.com, Furniture.com, HotLinks, INPHO/HomePriceCheck.com, Intelligent/Digital, KOZ.com, Mondera.com, MyFamily.com, NextMonet.com, NextPlanetOver.com, Oncology.com, OneCore.com, PlanetOutdoors.com, Productopia, Raging Bull, SnapFish.com, Speech Machines, ThingWorld.com, Vicinity, Virtual Ink, Visto, Vstore and WebCT.

CMGI Corporate headquarters is located at 100 Brickstone Square, Andover, MA 01810. Telephone: [phone]. Fax: [phone]. Additional information is available on the company's Web site at http://www.cmgi.com.

"Safe Harbor" Statement under the Private Securities Litigation Reform Act of 1995: Statements in this press release regarding CMGI, Inc.'s business which are not historical facts are "forward-looking statements". These forward-looking statements are subject to risks and uncertainties. For a discussion of such risks and uncertainties, which could cause actual results to differ from those contained in the forward-looking statements, see "Risk Factors" in the CMGI Annual Report or Form 10-K for the most recently ended fiscal year.