A few weeks ago I did a post on some Brits at Noise Solutions that are doing some interesting work using the Microsoft Kinect bar together with PC software to allow people to create music using nothing more than body movements.  The computer is running software made by a guy by the name of Chris Vik from Melbourne, Australia and he has some of his stuff up for view at his Kinectar web site.  

This isn't your old Theramin junk, it's actually pretty cool.  

Click the Read More link to see the video of their latest efforts.