But for those that don't know Michael Hedges... He pretty much wrote the book on percussive guitar playing and alternate tunings for acoustic guitars... I can't remember the exact number of alternate tunings that he recorded songs in but I believe it's over 60 or so... He was often called "The Paganini" of guitar.... which is a bold statement... He died in a car crash in 1997... Here's him doing a rockin version of All Along the Watchtower in 1987:
http://www.youtube.com/watch?v=rs0rKW2jqMU
His styles are seen in a lot of acoustic guitar players of today including one of my other favorite jammers... Keller Williams.