A somewhat chronological walk through my 3D printing collection, mostly focused on printouts of models made in Minecraft, exported using my free Mineways program.
Links to things mentioned:
Shapeways, a 3D printing service - http://shapeways.com
My Robot Nation, where you can design your own robot sculpture - http://www.myrobotnation.com/
Alexander Boden and Sebastien Draxler's work - http://www.flickr.com/photos/postapocalyptic/
Mineways, my free Minecraft model exporter - http://mineways.com
Vokselia, where many of the Minecraft models live - http://vokselia.com
FigurePrints, who also have a model exporter - http://www.figureprints.com/minecraft/Default.aspx
My non-profit Shapeways store, where most of these models can be found - http://www.shapeways.com/shops/mineways