While Google and MySpace are renegotiating their search/ads deal, eBay may be stuck in the middle. According to the Wall Street Journal (which doesn't necessarily mean it's true), Google would like keep eBay off of MySpace. Google and eBay compete not only for commerce leads, but for listings and payments as well.
Under a MySpace/eBay deal, the latter would add 'peer commerce' and payments to the former (and what about Skype?).
The interesting thing is in the negotiations part of the story. A MySpace/PayPal deal was on the cards long ago. It looks like it would allow MySpace to stay in control and demand a large cut of any revenue sharing deal by using a basic divide & conquer strategy after all.