We've all spent a good portion of the past few years imagining what we'll do as soon as we get our hands on our very own 3D printer. Of course, if you're of the particularly crafty, Make Magazine-subscribing sort, you've probably already built a few of your own. For those who don't know a soldering iron from a freshly-burned hole in their hand, however, it's been a matter of waiting for the technology to come down in size and price. A machine designed by professors at the Vienna University of Technology still has a ways