Yup, very cool stuff. At HP we had what we called "stereo-lith" machines, which were early 3D printers. Now it is available to anyone-- down load google sketchup, a freeware 3D modeling program with a modest (non-insurmountable) learning curve, download another freeware converter to .skp, email the model to any one of many 3D contract "printers", and in a week or so, you have parts.
Very Cool, but the piece price is still pretty high, and it doesn't scale down much with volume. I am investigating actual injection molding with an aluminum tool, but the first quote I got back was $7K in tooling.
Aint.Gonna.Happen.