Prepare to be creeped out:
www.rentmydaughter.com
www.rentmyson.com
edit: guess they got taken down. Interesting. I wonder if that means they actually WERE joke sites, or if the law enforcement types caught up with them. I guess we'll never know! Here's a cached copy of the daughter one: LINKY
Until then, there's always the brilliantly satirical www.blackpeopleloveus.com and www.zombo.com to satisfy your internet-itch.
edit edit: THE TARGET EQUALS THE DISPLAY, MOTHERFUCKERS!