Watch the Two-Hand Tapping online guitar lesson by Jeff Scheetz from Rock Tricks

Once again we give kudos to Mr. Van Halen. When "Eruption" came out it sent many players scrambling to try to figure out how the heck he was doing that. Once they did, it was all ten fingers from there out!
The basic concept makes perfect sense, using your right hand on the fretboard like another left hand. It got taken in many directions, with Steve Lynch from Autograph and Jennifer Batten on the rock side. And of course for the ultimate two hand experience you need look no farther than Stanley Jordan. Although a jazzer, a lot can be learned by watching him using both hands.