Standing just 0.75 ft tall, the Plen robot is powered by a 32bit ARM7 CPU @ 33MHz, has 18 movable joints, a USB RS-232C interface, and Bluetooth support. It weighs 700g and is available now in Japan at the price of $2,206. Video clip after the jump.
It manages to do it all with amazing smoothness and grace. Not only can this robot roller skate, it can even pick it self up when it falls down, and it roller skates just as easily backwards as forwards.