http://kotaku.com/5099691/jasper-360...hit-the-market
http://forums.xbox-scene.com/index.php?showtopic=668038
This guy still hasn't cracked it open, but everyone seems to agree that this one is the real deal.
For the uninitiated, "Jasper" is the new Xbox 360 build with the 65nm GPU that runs cooler and quieter and is speculated to reduce RRoD failures.
(EDIT here's a new thread where he's opened it and confirmed that it's a Jasper. There's even a sticker on the board that says "Jasper 1weeks run".)
http://forums.xbox-scene.com/index.php?showtopic=668104