In terms of online video.

Over the past few months, my "video watching" habits have COMPLETELY changed.  (In fact, I was flipping between Google Reader and YouTube when I saw Rommel's original post.)

Oh, and while I agree with the recommendations of Satriani and Stevie Ray Vaughn, for Guitar blues, I've always been pretty partial to Johnny Winter.  Not quite as talented, but guitar is all this "white-haired freak" ever really did.  This is a great rendition of Highway 61.

And of course, for some GREAT guitar, well, I give you Al Di Meola and Paco De Lucia.

These guys are GODS.  Especially wait for Paco around minute 3:30 to 4:00.