Playing COD: Black Ops on XBOX 360. Also just got the Kinect accessory, and am having fun with the family playing Dance Central and Kinect Adventures. My wife is using the YourShape Fitness Evolved game, and says it is loads better than anything on the Wii. She likes the freedom from a controller and balance board. The kids love Kinectimals too, and find it super easy to use.
Not thrilled about the lack of Netflix support, but I figure it's coming. Have used the video chat to talk to the in-laws in another state, and we really like not having to clamor around the small laptop screen and camera.