I found this via a link on Cabell’s blog, and it is one of the funniest cover songs I have ever heard. It is a fun little folk/emo rendition of Baby Got Back.
UPDATE: I just heard about this guy again on the Wingin’ It podcast. Apparently, he also writes a lot of songs with sci fi themes which (according to the hosts) are so well done you may not even catch the sci fi in them. I may have to investigate this guy further.