Flight of the Conchords

I first posted a little bit on Flight of the Conchords about a year ago, but the progress they have made since then is impressive - they even got their own show on HBO. Wow! Not only that, but one of them had a minor role in the Lord of the Rings trilogy, as Figwit, as well as once being in this band. Impressive stuff.
Even though they're among the funniest people ever to play guitar, they never get lazy, and all their songs are genuinely well written as well as lung-bruisingly funny. They deal with all the things you'd expect the 4th biggest comedy-folk duo in New Zealand to deal with, from groupies, to business matters, to racism. Except the racist is a dragon called Albi.
Here are some live mp3s and video, and you can buy the band's material here. Also, be sure and visit this excellent fansite, which has an absolutely amazing collection of downloadable stuff.

Business Time (live)
The Hiphopopotamous vs the Rhymenocerous (live)
Albi (live)
K.I.S.S.I.N.G Part A (live) and Part B
Business Time video (live on Conan O'Brien)




They're really funny.