Great suggestions so far. Since you don't suggest a specific style or genre, I'll just do as others do and ad a few names I have yet to read, but are worthy of the list (sorry if I missed them as I haven't read all the responses yet):
Rory Block, When a Woman Gets the Blues
Kelly Joe Phelps (a master - pick anything...I like "Shine-eyed Mr. Zen")
Dave Matthews & Tim Reynolds Live at Luther College
Joe Pass, "Way Out West" & "Virtuoso"
Chris Whitley, "Living with the Law"
Marc Ducret, "Detail"
Rory Block, When a Woman Gets the Blues
Kelly Joe Phelps (a master - pick anything...I like "Shine-eyed Mr. Zen")
Dave Matthews & Tim Reynolds Live at Luther College
Joe Pass, "Way Out West" & "Virtuoso"
Chris Whitley, "Living with the Law"
Marc Ducret, "Detail"