.stl file -- sample is printed in green abs on a Dimension SST.
11/10/2013: updated this file to be Replicator-friendly -- the polyhedron is now oriented to sit flat on the build table. It is scaled to be 3 cm in x.
The original (green) was printed on a Dimension SST in ABS. The file has been updated to be MakerBot-friendly, and will post a photo of a test on a Replicator 2 in PLA soon.