Temple of the Cyclops
by Stanos, published
This is a building my son created in Minecraft after I told him I would build something he made in the game. Exported from Minecraft using Mineways by Shapeways, imported and converted to .stl via Wings3D.
If you want to print designs from Minecraft, you can follow the awesome directions found here; http://repraprip.blogspot.com/2012/01/tutorial-printing-from-minecraft-with.html
As far as installing the mods into minecraft that you need to do the basic operations required, your on your own. You don't really need to have the mods installed unless you are printing landscapes. For smaller prints like this temple, you can do all the editing one block at a time. Has not been run through Netfabb since their servers were down, but it printed out just fine.