Bram Cohen's puzzle shop

I recently discovered through Twitter that Bram Cohen, best known as the creator of BitTorrent, is also an aficionado of three-dimensional construction puzzles (e.g. the Soma cube). He has lately taken to designing puzzles himself, and now sells several original designs through Shapeways, a web-based service that offers 3D-printed objects based on their creators' uploaded spec documents.

Doubly interesting to me: it's always a delight to learn that someone unexpected is into puzzles -- let alone a designer of them -- and I find the Shapeways business model surprising and intriguing, as well.