Check out the AirScan demo at NAB2009
http://www.youtube.com/watch?v=GsNrdE87Hrc
http://www.coolux.de/root/videos/casestudies/airscan_nab2009/airscannab2009.mov
The AirScan device is based on a standard industrial Laser Scanner that is incorporated into the upcomming Widget Designer Pro.
The AirScan input can be mapped to control the mouse to interact with layers and all other features of Pandoras Box.
Widget designer Pro offers single- and multi-touch control by assigning 2 point x&y position as well as distance and angle to the desired parameters