Rock out with your Kinect out with this kick ass air guitar project using openFrameworks and the ofxKinect OpenNI libraries. By positioning your hands in a certain way, you can scale the chord progression by moving one hand either closer or further away from the other. To sum things up, we're talking high tech, bleeding edge air guitar awesomeness.
Check out the video to see what I'm talking about. You can actually produce some pretty bad ass sounding chords using this MIDI integrated openFrameworks project.