Hot Tuna (Jorma Kokounan — SP?) also did a version of this with some great guitar work. Chords are fairly simple — Am, E, Am, E, Am, C7, F, C, G, C, C7, C and repeat for each verse. Sorry, I don't know how to do Tab on this thing. The only tricky part is going from the third Am to the C7. It requires a run up the first string (E, F, F#, G), then C# and B on the B string (2nd) and an A# on the G string as you fall into the C7 position. Has to be done in one fluid motion for it to sound right. Haven't quite mastered it myself, but it's coming along.

cheers,

david