I've been looking around the Internet for jokes and funny stories but to be honest, the best places to find such things are well-established forums so I would probably tell you to go there to find them. Fan Fiction sites, massive Harry Potter forums (ala TLC, Mugglenet, HPANA, etc.) all have sections for humor, jokes and stories. But if you see something and want to send it in please do so. Email me at jellocat@potterparodies.com and tell me where you found the joke or at least send me the URL to post with the joke/story - whatever you find.

This area was meant to be just a little library of such things - jokes, riddles, etc. and not a fan fiction server. But I'm not adverse to having fan fiction if it's funny so if you want to submit something send to the email address above. 

Happy hunting!