An AJAX based online game where you and a small group of other people attempt to survive a deserted island scenario for 15 minutes. At the beginning of the game each person can buy items for a set price, but is blind to the other's purchasing decisions. This can be a problem when all that people bring are guns.
Robots are dispensed by a benevolant socialist goverment to teach people how to live their lives right. Eventually the robots become corrupted if you don't maintain them well and they start pulling hilarious deadly pranks. Not exactly sure about what sort of game I'd make out of it, maybe a simplified RTS game or an adventure game with light RTS elements.