Reactable - Incredible multi-user desktop interface

This wonderful clip shows Reactable - a research project from Universitat Pompeu Fabra in Barcelona. It's a translucent table with a camera and a projector underneath. The camera scans the positions of various blocks, which can be twisted and linked. We've seen this kind of stuff before - Audiopad seems the most similar, and multitouch might be more practical - but I'd love to play with this thing myself... (thanks, Bram)