Shaky cam, but you get the idea.
 edit:
Al3xand3er got to this one before me:  http://www.giantbomb.com/project-natal/92-3249/new-natal-tracking-video/35-405277/#6

Very cool. I wonder if it can see down to the finger level, that could totally change everything.  
 
Just me or does the screen go completely green near the end? 

crap, meant to put this in the natal forum.

" Very cool. I wonder if it can see down to the finger level, that could totally change everything.   Just me or does the screen go completely green near the end?  "

So how is this supposed to recognize facial expressions?

Yeah, definitely seems to mess up at the end, when she moves out of shot and it seems to remove both characters from the screen.

" So how is this supposed to recognize facial expressions? "

Wow, that does look pretty neat. The two people thing was cool.