Watch the Billy Gibbons online guitar lesson by Jeff McErlain from Kings of Tone
If you can I suggest seeing ZZ Top live, they are fantastic. Not only do they put on a great show, they still play their butts off. There is an excellent dvd out called Double Down Live 1980 & 2008. The footage from 1980 is especially amazing, it's great to see them before they became huge in the 1980's MTV explosion. Their sound is refined but raw and Billy's tone is huge, one of the best power trios in rock and roll. Can I also mention what great singers Billy and Dusty are?