*They Might Be Giants (Unofficially) -- the best TMBG site out there, in my opinion. Audio, lyrics, absolutely anything else you'd ever want, except perhaps mp3s...
*They Might Be Giants -- Better Living Through Better Music -- Problem solved. I think these guys have about 200 (or is it 300?) mp3s, including singles, John Linnell's State Songs, you name it.
A World That Swings
The Big Steamy Thing -- the official site. It's nice -- tour dates and such -- but I like tmbg.org better.
The Almost Completely Nonexistent Linnell Fan Club -- I'm a member!