Thanks for the Charlie Hunter recommendation, I'll keep a lookout for him.
Saw Dave MacKenzie (a great guitar player) last night, another one of those guys that can keep a bass line going with their thumb while doing some intricate melody line finger picking. Did some cool blues stuff. He is also a fantastic slide player. Adie Grey was with him (she has such a "warm" voice). Check him out, if you like acoustic blues. He is versatile enough, however, to accompany Adie, who is more of a "Americana" type artist.
Did you say you were in Boston? Are you familiar with Bill Kirchen and Too Much Fun? I think they are based in Maryland.