Creative Commons Filk

Lazy web request from an exhausted and overwhelmed man. I hope to put together my first Orycon episode of the podcast in the next few days and I’d like to get some good filk and/or fannish music to go along with it. I would appreciate it if someone could please point me to a resource with such music that is offerered under a Creative Commons or other reuse friendly license. I know I could look this up myself but I’m up to the keister in crocodiles. Thanks in advance, friends and fen.