Stringless cello:
http://is.gd/76LKr is a little more serious in terms
of physical interface emulating an existing instrument. I actually
dry-tried one (it was during a presentation and it was passed form
hand to hand so it could not be hooked up). I could see this idea
transposed to a guitar (check guitare à crayons
http://is.gd/76N6W,
which is a good start).
I like the idea of the resistive, pressure sensitive strips on the
neck but I would also like a large palette of flexibility in my right
hand as well.
./MiS