Zachman uses his free PixelMaker addon to create 3D printed pixel art.
Learn how to 3D Print a sprite with Blender in this quick tutorial!
In the month of May, Shapeways is allowing me to give people $10 off when they order for the first time! Just email me at masteringblender (at) gmail (dot) com to get a code!
There is also a text version of this tutorial available.