If you haven't been following his work, Chris Vic is doing some really amazing stuff with his Kinectar Performance Platform. This latest video shows what can be achieved when Kinectar is used in tandem with live performance art. The end result is an immersive experience that seamlessly mixes live motion with musical accompaniment that is generated by the performers actual motion.
The Pulse project was designed to engage audiences by combining musical accompaniment that directly translates motion being captured by the Kinect sensor. The entire application was developed in house and required the development of their own language (Pulse SL) in order to achieve a clean, small footprint that sends notes or controller events to music software such as Ableton Live.
Just stumbled across a cool little hack that uses Processing and a Kinect to overlay a digital "shadow" onto a live performer or user. The developer is projecting live Kinect date being pumped through his Processing sketch using Daniel Shiffmans's OpenKinect library onto a TransScreen. Someone at the helm can control different effects that the sketch can produce and cycle through them in order to create a very dynamic visual effect that can be changed while the subject continues to move around.