Willow Garage recently held a contest to see who could use their open-source Robot Operating System in conjunction with a hacked Microsoft Kinect in the most interesting or useful way. The first place winner is this Customizable Buttons hack. In short: draw buttons with a marker on a piece of paper, then press them. The Kinect recognizes the buttons and the pushing of said buttons, and executes commands--in this case, music. It's like a childhood dream come true.
Everyone loves the beer-fetching Willow Garage PR2 robot, as seen in our recent gallery of its greatest achievements. Evidently, it even loves itself. When developers at Bosch Research gave it a pen, it drew a handsome self-portrait.