Lego 3D printer itching to make Lego robots

We've seen Lego robots that do Sudoku puzzles, solve Rubik's Cube, and mimic the human hand. Well, this Lego robot builds Lego models--so far. How long until it starts building other robots out of Lego? Hobbyist Will Gorman built his Lego Mindstorms NXT MakerLegoBot for the ongoing Lego World 2010 expo in Zwolle, the Netherlands. Inspired by the open-source 3D printer MakerBot, the machine is made of more than 2,400 bricks and runs on three NXT Intelligent Bricks and nine NXT motors. A PC running the MLCad Lego design system sends instructions to the printer via USB, and it then starts selecting bricks from its large-capacity feeder system.