Can't be bothered with sweeping the floor of your dorm room? We understand you've got other priorities. (We'll just leave it at that.) Let the iRobot Roomba 410 shoulder the burden of keeping your floors and carpets spic 'n' span. This 9-lb. (4 kg) discus-size robot is equipped with sensors that detect the size and shape of a room; once activated, it will work its way across floors and carpets, sweeping and vacuuming as it goes. The battery-powered Roomba is designed to maneuver around furniture and avoid treacherous staircases, and it should be able to polish off a couple of average-size rooms with a single charge leaving you with little to do except empty the filter.