Ela Lamblin is a Sculptor and Musician from Oregon, His instruments combine music with visual performance/dance etc. and are really breathtaking!
Pedro Reyes has made some pretty incredible looking and sounding instruments from confiscated guns.
From what I gather they're touring as an exhibiton called Disarmed, but on his blog he talks about a project called Imagine which shows off 50 instruments made like this!
A while back I found out about this instrument via the OddMusic website. Back then there was just one image, a description and a soundclip. It amazed me so much that I can safely say it's one of the instruments that first got me really interested in building and creating my own things.
I'm very glad to see they now have their own site! with videos and everything.