About this 3D model
I did a little sketch with iTracer on my iPhone and printed the object with a MakerBot. Quite easy, but I had to change the 3DS-file that iTracer exported to a STL-file with Meshlab and the size of the object in Blender. But there's still a lot of software involved: iTracer -> Mail -> Meshlab -> Blender -> Skeinforge -> ReplicatorG What we need now is a 3D scanner app for the iPhone!