Have just got my new xbox with kinect. I love it.
Yes, I am not a hard core gamer (at all), but I love the idea of not having to hold anything to play games. And not sitting on the couch. I got the xbox for those little bits of time when I am at home and to avoid the tele (there is nothing on anyway)
Currently I only have the Kinect adventures game (that came with the box). It is pretty cheesy, but fun. It takes a bit, but you get used to the action of directing the player on screen. It has reasonably good tracking. I imagine in the future it will be a lot better - or I'll get better at directing it.
The best thing is that you can use the controller to navigate menus if you get tired of waving at the sensor. With the WII, I've noticed that you don't have this option
I can't wait to get the dance game.
My tips are
1. You need a bit more space than what the guidelines say. The box says that you can play in a 1.8m area in front of the sensor, but really the sensor would prefer that you are further away - say another 1.5m. Not many places have a clear 3 x 3m area in front of the tele.
2. prepare for blisters on your toes. You really need to move around and jump.