The Roomba is a great device, but it has an Achilles heel: it can only really clean carpets. You want to wash your wood or tile floors? You need a mop. Or, in a perfect world, a mop robot.
That's just what Mint is. This Roomba-like bot picks up dust with a dry rag then follows that up with a wet cloth to polish the floor up. It's available now for $250, although it should be noted that it lacks some of the features a Roomba has, such as bringing itself back to charge or moving itself from room to room. But still, if you hate moppin', here you go.