Victor Gama creates his own instruments and performs live with a strong visual element (instrument and projections included).
Definitely check out the "Instrmts 4 Da Museum" under the Projects section.
He's performing at Brown and at Carnegie Hall with the Kronos Quartet in early March for those interested.
This is an interesting piece that crosses from musical instrument to art piece. The rules given to the piece give it a distinct sound, abilities and difficulty, but make it truly unique.