San Francisco--CNET said Friday it will provide a broad-based marketing deal with Deltathree.com, a developer of Internet telephony, in exchange for an $11 million, two-year advertising commitment and an equity stake in Deltathree.com, New York. Under terms of the agreement, Deltathree.com's technology that allows people to use their computers to make telephone calls will be integrated into shopper.com and other CNET sites. The deal underscores the growth of start-up companies looking for early brand awareness by integrating services on advertising-supported sites, said Matt Comyns, associate VP-strategic development for CNET, San Francisco. ``This is a growing trend,'' Mr. Comyns said, ``but these deals are harder to do if you are not a top-20 Web network. Power does accrue to the strongest players.''