I'm definitely interested in the Kinect Star Wars game as well. Didn't really like the video with the unnamed Jedi fighting stormtroopers, vulture droids and AATs (since they're from different trilogies), but I think the game could be good/fun. There was a recent report that the game will also feature pod racing, the ability to play as a rancor and, of course, Jedi battles that you can play standing up, but also seated.
I'm probably getting a new 360 next month. I'm going to give my current 360 (20gb version, no hdmi) to my cousin, for her kids. I was looking into the new 250gb version with Kinect. I almost bought it a few days ago, but I decided to wait until Microsoft's E3 press conference.