That, and new Scooba models from iRobot (makers of Roomba), who mop the floor with efficiency similar to those Anthropology majors at fraction of the cost.
iRobots consumer products are kind of a joke. I got a "Looj" http://www.irobot.com/en/us/robots/home/looj.aspx gutter cleaning robot for my parents once; it was totally useless. An unemployed college graduate would have done a much better job in the sense that the robot didn't do the job at all.