A 3D printer made from lego bricks (w/video)

(Nanowerk News) This is a 3D printer that prints in hot glue and is made almost completely out of legos. Based roughly on the first version of the makerbot, while it does print, it is more of a prototype than a finished project.
LEGObot 3D printer
Engineering student Matt Krueger, who built the printer, has documented his printer and uploaded programs and .ldd file he used on Instructables here: http://www.instructables.com/id/LEGO-bot-3d-printer/
Watch the video here:
Source: botObjects