It's great to listen to multiple versions of the same song from the Conchords, because they're such a live act they never sound the same twice. I've heard about 3-4 versions of "Business Time," and even more versions of "The Robot Song/Humans are Dead". There's a superb fansite at whatthefolk.net. Also, there's a cheap EP out with 6 tracks for $4, but it's part of an album that's due in October, I think.