This demo uses a kinect on windows with the Unity3D game engine. The nitty gritty is that it's using a special driver along with OpenNI ( openni.org ) and the NITE skeleton tracking module keeps track of a person joints using the initial calibration pose.The skeleton data moves the corresponding IK goals, add some rigid bodies, colliders and bam! You have a giant person swinging hammers in a city. Just a first draft but Godzilla is soon to come. I'll be updating my blog with a more detailed entry soon.