Justin Wood is the man. And I've been dying to see LJ Booth live. He has an unusual combination of guitar technique and songwriting ability.
If you like that stuff, check out Andy McKee:
http://www.youtube.com/watch?v=dt1fB62cGbo
Of course, if you like Andy McKee, you'll also have look up Michael Hedges, Don Ross, and maybe Kaki King:
http://www.youtube.com/watch?v=uADkFy7DZXY
http://www.youtube.com/watch?v=bbJnwk3GBiM
Michael Hedges has always been a favorite of mine, though I've heard he had a proclivity to steal girls from unsuspecting glider pilots. Don Ross and Andy McKee don't have the stage flair of a major act, but their talent is unbelievable, which impresses me far more, anyway.
Finally, Marcus Eaton combines the guitar style of Justin wood with the layering/sampling stuff that Reggie Watts does. It's hard to find good Marcus Eaton stuff online, but I'd highly recommend looking him up if you're ever in the Northwest:
http://www.youtube.com/watch?v=qpIw-GjAd-A
He's been touring with Tim Reynolds, and they seem to make a good pair.
Do you play guitar, Chip? We could round up Eamon, Matt, and anyone else with interest for an ad hoc Gastons amateur performance. Guitars don't weigh much.
Matthew