I can't be the only one with ideas too big for my wallet here.
Being the thread startin' guy, I think its only fair I start this shit off.
For a while now, I've wanted to build a robot to play a bass and/or guitar, with the ability to upload tablature so I could rock out with a robot.
What I have in my head is a hand that moves on a track alongside the fretboard, that checques its position through, say, an old ball-mouse LED-wheel full of holes-phototransistor ensemble. The fingers would individually move, everything being controlled by microcontrollers, and there'd be some sweet picking system that i havnt thought out yet. Possibilities of sly phrases while playing bass
"Daaayumn thats funky", etc
Also, possibly motors affixed to the tuning pegs with a feedback system going on with a hacked digital tuner for ultimate permanent tuning.
Wouldn't that be freakin sweet? Yeah, thats what I thought.
I think I've seen it done before on the New Music or some junk.