Based on the <a HREF="http://reprap.org/wiki/Main_Page">RepRap</a> platform, the <a HREF="http://printrbot.com/">Printrbot</a> is a $499 3D printer accessible to everyone. Designed to be built in a
<img src="http://www.crunchgear.com/wp-content/uploads/2010/08/reprap-3d-printer.jpeg" />3D printing has been gaining a lot of popularity in the last couple of years. There's even a DIY 3D printer com