It looks like we've got a full-on battle royale coming up in the tech industry. Business Week says, "Yahoo partners with eBay to battle with Google, which is teaming with Dell to put the heat on Microsoft". Sounds like things could get ugly.
"Under the Yahoo-eBay partnership, which covers only the U.S., Yahoo will supply eBay's site with ads, and the two will split revenue generated from them. eBay's auction listings will be included in Yahoo search results, driving users from that site to eBay's listings. Yahoo will also let users pay for Yahoo services using PayPal, eBay's online payment-processing company, and Yahoo links will be included on the eBay toolbar."