Check this guy out.

this guy is pretty cool, he plays mario music on his guitar and even does the sound effects.

http://media.ebaumsworld.com/index.php?e=marioguitar.wmv

[coolbeans326]

its not working right now, but you can get halo for PC and I'll play you!!! [:)}

[Dirk_Ermen]

i've seen it before, quite cool to do it, i wish i could do that [:P]