Mineways: 3D Prints of Minecraft Objects
Well, now's your chance.
Eric Haines from Autodesk (the makers of 3D rendering software, no less) has just released his Mineways program to the world. Mineways allows you to select various blocks from within the game, trim them up, and send them to 3D printing service, Shapeways.
The process is extremely simple, and after a quick turn around, you can have any Minecraft scene, object, or mob rendered into a real life object of your very own.
Yes, this is now possible to export, though best of luck interacting with it all...
The Hopper, now easily rendered with Blender:
and a print from Shapeways (sadly, parts broke off in shipping):