[Dalek Nation]

Kinect Sports 2: My fave, golf, isn't a big calorie burner (no surprise). A nine hole set (front or back) is going to burn between 50(ish) and 70(ish) depending on how well you do (more strokes = more calories).
Tennis: Between 40 (for an easy opponent) and 60 (Pro opponent... can't beat a Champion). This will depend on (obviously) how many times you had to swing. Fastest way I've found so far is beating a Pro, as Tennis matches are quick, so about 50 cal. per five-ten minutes.