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The massive AT&T campaign launched on New Year's Day will hit the web on Jan. 9 with a splash that the company says will be among the largest in internet history, according to AdAge (via MediaBuyerPlanner). Just about half of all web users - about 137.8 million unique users - will see ads for the newly merged company.

The campaign will include homepage takeovers, banners and dual ad units synchronized on the same page. Sponsorships will also make up part of the campaign: Investor's Business Daily is offering a week of free access to its high performance stock screens, investment tools, and investing courses at Investors.com, sponsored by the new AT&T.

The strategy of the estimated $500 million-plus campaign is to portray AT&T, reborn after its merger with SBC, as the world's most complete and secure network.