dammit, someone already mentioned michael angelo batio.
there were some hilarious videos on youtube of a czech or polish (i think) guitar wanker playing a double neck, but i don't remember his name... does anybody know?
i'l just metion eddie van halen here, because nobody else has and few guitar wnakers get to play for such large audiences
http://www.youtube.com/watch?v=1eJgRJ15XzI