All appreciation for this great band of Jack Black and Kyle Gass goes here in this very thread. And I do mean it when I say this is a great band. The songs themselves are hilarious (they don't take themselves seriously at all), but what makes it even better is that this is actually good quality music. They pay homage to Rock, Hard Rock and Metal. Jack Black has a good voice (to some people's surprise) and the structure of all the songs makes it easy listening. So if you don't know about 'em, get to know 'em.
Here are their two studio releases:
Tenacious D (Self-Titled):http://www.sendspace.com/file/7i8pax
The Pick of Destiny (from the movie of the same title that I also highly recommend):http://rapidshare.com/files/115806706/T ... y.rar.html