Clown Forum
A place for clowns and entertainers to meet and talk about clowning, circus and related arts. Exchange your ideas and have fun with other clowns and entertainers from all around the world!
http://www.clown-forum.com/

Dont Make Me Laugh
A collection of humor categorized by subject. Categories include yo mama, blonde and silly jokes. There is also a facility to rate each joke.
http://www.dontmakemelaugh.com