Who plays the theme song? I downloaded it and it is labeled with Les Claypool, who is an amazing bassist but I don't really think the song takes that much talent. Anyone know anything?

That's the same info I see, Les Claypool as the artist, Jonathan Wolff (http://www.taxi.com/faq/ftv/wolff-tv-1.html), is the composer (did a ton of themes).
Claypool is/was the bass player for Primus, I think its the same guy.

http://www.logo-magazine.com/dvds/display.asp?dvdID=63

http://www.gearchange.org/descriptions/Les%20Claypool%20-%20Seinfeld%20Theme.html

A rock bassist did the theme for Seinfeld? You learn something new everyday.

I'd recommend Primus to anyone. They also do the South Park theme song. Les Claypool's voice is the one that starts and then you hear it between the boy's singing. But theme songs aside, they are an amazing group and are amazing live.

Hey now Phishin37, welcome to the forum.