Epic Win is aiming to make day-to-day chores more fun through rewards and levelling:

EpicWin is an iPhone app that puts the adventure back into your life. It’s a streamlined to-do list, to note down all your everday tasks, but with a role-playing spin.

The video trailer is certainly fun anyway:

My guess is that the mechanics of reward will be a mix of pre-configured tasks (“doing the laundry: 50 points”) and user-entered tasks. If there’s anywhere where I think the idea might fall down it’s that the user will have to decide their own reward. It might also be more fun if the character you were building could then be used in some way; my first impression is that it’ll be about self-expression to some degree, but how much of a driver that is in an abstract environment is open to question. But given the creativity that’s gone into the video preview it looks like there might be enough fun in this to keep it interesting.