Have you had any contact from people who are considering using Kinect to control wheelchairs?  A one-handed version that requires just a finger to control, would be useful.  I am not up to date on modern electric wheelchair controls, but my brother had Duchenne's muscular dystrophy, and over time due the deterioration of the muscles, it was harder and harder for him to control it via the joystick which still required mechanical input.  Other motions besides hand/finger control would also be useful for people with paralysis and other conditions.  One recognizing blinking and eye motion might be possible as well.