Check out the filk lyrics websites, there is some howling, brilliant stuff. Excellent resource for parodies, funny songs, etc.

http://www.cybernothing.org/~deoridhe/filk/

http://audiomusic.info/cgi-bin/lyrics/index.cgi?base=%2FArts%2FMusic%2FStyles%2FFilk%2F

http://www.prometheus-music.com/eli/virtual.html (MP3s, etc)

And the great Leslie Fish's Filksong site:

http://www.prometheus-music.com/eli/leslie.html