We just bumped into the MakerBot industries folks and got a quick look at the CupCake CNC rapid prototyping machine (3D printer, for us luddites). The thing extrudes Lego-type plastic into fairly detailed shapes, and MakerBot sells it as a kit for $750, or fully assembled for $2,500. What's most exciting is that the MakerBot folks are now working on a 3D scanner kit, which once combined with the CupCake CNC will make a full-on homegrown replicator. Diamond Age, here we come! A quick demo of the CupCake is after the break.