At the risk of sounding like I belong with the last 16% of the bell curve... Hey, that Flight of The Conchords show done by those Flight of The Conchords guys is pretty funny**!
** = in my defense, they've only just started airing the show on TV in Canada... and it's only shown randomly on the movie channel between episodes of Entourage.
I had a bunch of live bootleg FOTC mp3's from a few years back, and they were just okay-funny (maybe, because I was trying to paint them with the same brush as Tenacious D... for shame, me). But the show really builds on to the humor of the original songs... also the fact that most of their songs have been refined/produced to sound more like the original songs/artists they riff off of is kinda cool too. Case in point: the Pet Shop Boys-heavy "Inner City Pressure" (posted above) rules.
Anyways, this weekend I marathoned through every episode available on teh internets.com. You should too... start here.