Cheap multi-touch pointers and head tracking using Wiimote

I thought this wiimote project might be of interest as an input device
for Croquet.

http://www.cs.cmu.edu/~johnny/projects/wii/

The site provides instructions and software on turning you Wii remote in
to a fairly general purpose tracking device, able to track up to 4
infra-red light sources. Including tracking somebodies head in 3d using
the Wii sensor bar.

Oli