Yahoo! and eBay have announced a partnership to provide services to each others' customers. Under terms of the deal, Yahoo will become the exclusive third-party provider of all graphical ads throughout the eBay site, and sponsored search for complementary products on some eBay search results pages in the United States.

In addition, eBay's online payment service PayPal will become the exclusive third-party provider of its online wallet. In addition, Yahoo Web search features will be integrated into a co-branded version of the eBay toolbar, and the companies said they would explore developing "click-to-call" ad technologies on their respective Web sites. "Click-to-call" provides a link inside an advertisement that allows consumers to directly call the advertiser to pursue a transaction.

Under the pact, which gives Yahoo access to eBay's vast base of online shoppers, the companies will begin to roll out their joint initiatives this year. Yahoo and eBay said they do not expect the partnership to have a material impact on their financial results this year.

(www.yahoo.com; www.ebay.com)