Electrolux Robot Vacuum Cleaner
An anonymous reader writes "Modelled on an ancient arthropod the Electrolux Trilobite is in stores from Friday and should cost around £999." It isn't the first robot vacuum, but they do claim it automatically recharges itself (which I don't think the Roomba does). And for only 8 times the price! A bargain. Electrolux's website has some more information.
Dyson (of the uk) have had a vacuuming robot for a while now, and it uses supersonic air cyclones rather than bags to separate dust and air so that no suction is lost as the thing sucks up more dust..
you can see it here