Shapeways - 3D Printing, Interesting Materials

http://www.shapeways.com/ has some interesting materials available for 3D printing, including an "alumide" mix of aluminum and nylon.  While not strong, it offers a sought after appearance.  Shapeways is able to create a number of different objects from whimsical to utilitarian, like this working compressor.

Check it out at http://www.shapeways.com/model/198434/mini_centrifugal_compressor.html?gid=cg14