It's probably already been mentioned on TL, and I was reminded by coltrane's recent blog, but for those of you who haven't seen it, this man is amazing.
He's a jazz guitarist who plays a modifed two-hand tapping technique; it allows him to play two guitar parts at the same time on two different guitars. Watch the above video, it's crazy, and check out his others
That is pretty awesome. According to wikipedia, Stanley Jordan was a classically trained pianist. It's very interesting how people apply their skills in very innovative ways.
The first time I saw this kind of two guitar tapping technique was on a youtube clip of Zack Kim. Here's one of him playing the Super Mario theme:
Yeah the first video I posted was just some cool tapping. But I find Michael Hedges to be a great listen, it's cool to see the bass played at the same time as guitaring.