This doesn't have a relevant topic anywhere on the forum as far as I can see
First take a look at this link:-
http://createdigitalmusic.com/2008/12/31/intimate-control-multi-touch-new-models-and-what-2009-is-really-about/Do make sure you watch the whole video, it gets more interesting as it goes on! It is a fascinating, and I think quite unique sensing system.
Now have a look at what is being developed as a commercial version:-
http://www.madronalabs.com/hardwareWhat I find especially interesting is that although they are seeking patent protection for the hardware, they seem to be encouraging people to develop D.I.Y. interfaces and software.