Rob Hof at Techbeat gives preliminary details on eBay's plans for Skype. Rob says they've already "started creating a pay-per-call advertising service that will use Skype (Think "Google ads for phone calls")." That doesn't sound too appealing to me. I don't object to ads that take up space, but hate it when they take time. (Yes, even floaters on Web sites, including this one, that slow me down for a second or two...)
UPDATE: Rob says that the ads will not be not be spoken, but instead display ads on the page where people click for a phone connection. That sounds much better.