IRobot Sander

I love the iRobot collection.  If you haven't seen what they do you should take a look at: www.irobot.com. Anyway, I think one good idea would be to make an iRobot sander.  Then if you needed to refinish the deck you could just set it up before you leave for work or get ready to watch a football game and when your finished you've got a stainable surface.  This would be a good tool for hardwood flooring guys or people who refinish tables.