"This is the new controller for the X-Box 360 which also works with any PC running Windows XP via USB. You can't even buy this yet, but I got one when I attended a game developer's conference hosted by Microsoft. It's absolutely genuine, I guarantee it. Thanks for bidding! "
The funny part of the story is that the winning bidder is supposedly Jeff Henshaw Executive Producer for Xbox Digital Entertainment. The auction ended at $91.00, and I guess any competing bidders were pretty much without any real chance of winning the auction as Microsoft understandably wanted the controller back.
ebay auction 360 controller