When did they remove it from the Marketplace??? as it was available to download before the Marketplace was launched and I just noticed its not there anymore 
I would be interested to hear if this tech demo will ever make it into the marketplace
Though it would probably need a complete overhaul due to back then it was running on an old OpenGL system for lightng.
Furthermore,
It would be rather spectacular if it also had OculusRift & Leap Motion support for use with the VR Mount