Using an IR led array and some reflective tape, you can track fingers in thin air using the Wii Remote by Johnny Chung Lee, Carnegie Mellon University. The grid software is a custom program written using a C# wiimote library and DirectX. More information about the grid software can be found at http://www.cs.cmu.edu/~johnny/projects/wii/Tags:wiiremotewiimoteminorreportfingertrackinghumancomputerinteractionJohnnyLeeCMUCarnegieMellonUniversity
Are there any other kinds of hacks being done currently like these two? I've got some time on my hands and was thinking of hooking up and playing with the white board one, but I'm curious if ther..