OK, this is awesome: Chore Wars. It's basically a fantasy role playing game web site with experience points and gold and armor and leveling up, etc. But the hilariously cool part is that you earn your experience points by doing real-world chores at home. So the idea is - your household or office signs up together, and the more chores someone does, the higher he or she levels up.

Man I wish this would have existed when I was a kid and we had chore lists and stuff. This would have made things a bit more fun. :)

Found via WebWare.