Abit of research of what Wii controller hacks are out there

This project my Johnny Lee looks like it could be the most useful as 1) its very cheap to create 2) it has elements of exploring a space (a 2D space but hopefully with a little work it can work with a 3D space) and 4) the source code is available on Lee web site.

Heres the link to Johnny Lee's site : http://johnnylee.net/projects/wii/

Also I found a blog called Hack A Day which is full of Wii controller hacks, just now am making my way though it researching for any other relative hacks