Oh hello, pretty. This appears to be Microsoft's upcoming Project Natal, complete with instructions, as seen by someone hired to test its speech recognition.
There's not a lot of new info to be found here, although it appears that the Natal unit will need to be plugged in to the wall rather than drawing power from the Xbox. And there's a tilt mechanism of some kind that it warns you away from messing with and breaking. But other than that, yep, looks like Natal. [Multiplayer via Destructoid]