So, Nortd Labs has officially released their new multitouch hardware. It's a vision-based system with larger screen size, improved dragging performance, and better rear-projection capability.

Project Page: touchkit.nortd.com

Tracks are Rock On by Jackson and His Computer Band and Meganerd by ytcracker.

AirXY, by Erik Adigard & Chris Salter was commissioned by the Venice Biennale for the 2008 Architecture Exhibit.
This video was shot during our installation tests in early August 2008. The graphics are not the final ones and the sound has been edited for the video and doesn't relate to the actual AirXY sound events. In the installation, they focus exclusively on the floor projections.
With: Harry Smoak, Hugues Bruyere, Elie Zananiri & Patricia McShane
Exhibit director/curator: Aaron Betsky
More at airxy.org

a quick demo of the newest version of the touchkit hardware available from nortd.com/touchkit