The folks at Shapeways surprised me in January with a 3D-printed version of the UK cover for my novel Makers, which had been designed by Shapeways community member Dmitry Kobzar. Mr Kobzar was good enough to release his 3D files under a Creative Commons Attribution NonCommercial license.
Now Shapeways is selling 3D prints of the cover for your delectation in a variety of materials (just in case you don’t have a 3D printer of your own with which to run off a copy!). For the record, I don’t get any of the proceeds from it — I just think it’s way cool.