I don't know if this has been posted before (it is quite old) but I can't find it.
It's the story of Star Wars Ep 1 as told by the South Park characters (with no Jar Jar binks!)
http://staffweb.cms.gre.ac.uk/~cs39/ParkWars.mov
I have a bit of Trivia for you as well: Does anyone know why 20th Century fox use two versions of their theme? There is a short version and a long version (used here and on the Star Wars movies). If I can, I will rep the person who gets it right..
Edit: This is hosted on my web area at work, and we currently seem to be having trouble with our connection. The Quicktime may take a while to download (it is 40 Meg).