Kidding. We kid. That's what friends do, right?
As thousands of eBay's biggest sellers gather in Boston for a convention sponsored by the auction site, Google invites them to a party promoting Google Checkout, a payment system that competes with eBay's PayPal. In response eBay, the single largest buyer of search ads on Google, "tests" a shift of its marketing dollars, pulling all its U.S. ads from the search engine for more than a week. Google cancels its party. 
Last updated January 16 2008: 5:51 PM ET
