I have to say I'm a little surprised myself. My boys got the Xbox 360 with Kinect for Christmas and one of the games we got them was the Dance Central game. My husband kept challenging me to dance, so finally I did it just to keep him quiet.
I have to say I crushed it! I unknowingly picked one of the hardest songs and guess what - Mama's still got her moves. =) My hubby was a little shocked I think. I even challenged my sister and crushed her score.
It was a great workout too! There is a workout mode, so once we get back home I'll be checking that out. I think they have Zumba for the Kinect too, so I'll have to get that and try it.