GeForce-Powered Augmented Reality Sandbox [video]

I believe this is the project shown in this video: http://idav.ucdavis.edu/~okreylos/ResDev/SARndbox/

I've been tempted to build something like this since I have a Kinect and a passable lightweight projector but sadly, it's building the actual sandbox part that's proved to be the roadblock to my ambition on this project.

Guess I could try doing a smaller version to work out the kinks.