Here's one that doesn't show any goodies but is an exciting scenario - very public. British girl pees on the street behind a shower curtain.
Girl pisses in street Llany.mp4 [www.keepvid.com].flv
Another I found on youtube that shows a girl peeing against a fence.
Newey Girl Mating Call.mpg [www.keepvid.com].flv
Here's an excellent security camera clip from youtube:
Gotta love work [www.keepvid.com].flv