Yeah, I was interested, then saw a Roomba for sale on kijiji from a local guy and bought it for $80. Then got 2 more virtual walls (I got 4 now) a scheduler remote and a docking station for $40. And now I also have 2 fast chargers. Got a new 3500Ah battery from the States for $26 plus shipping. Now I just have to make my Chumby One control Roomba and transform it into a vacuuming butler robot, hehe. The only thing I don't like about it is the lack of Forward(distance, speed) and Spin(direction,angle) commands. Have to poll the encoders all the time... Time to try out Admin's wavefront code!