enrico_suave writes "Whoot.org (linked via Coral P2P Cache because the poor guy is hosting on a ADSL line) has cool design pics, a now removed video clip, and some interesting details of the process. From one of the plog entries: 'We've developed a print head that will print 5mm 'pixels' of the consumable. It basically acts as a pump. It's a medium sized lego gear (driven by a worm gear attached to the motor) with four axles that repeatedly squeeze and release a pipe attached to a funnel that holds the consumables. a half-rotation of this wheel yields a blob.'"