Perfect!  Have a great minecraft property you have lovingly shaped and worked on?  Why not make it a real model using a 3D printer!  Totally!  The WINS of minecraft just continue to pill up.  I remember first playing with it when it first came out thinking, what a cool little indie game. Never would I have thought it would explode to the levels we are seeing now.  And now you can convert your minecraft model to solid 3D.  Sweetness.

Makes sense though.  Based on how the modeling works, it would not only be possible, but quite easy, and something a 3D printer will not no issues with. The open source program is called Mineways.  Its a windows application, but will work on Linux using Win and I would bet on Mac using a Win emulator. Following is a video to show you how it works.

Now, just waiting for a Lego version.

From the site itself..

With the free Mineways program you can interactively select a model from a Minecraft world map and render it, or send it to a 3D printer or 3D printing service such as Shapeways.

Stuff:

• Download the latest version of Mineways (version 1.04, updated 1/2/2012) – Windows only, but it works on Linux under Wine (and I suspect also on the Mac – let me know).
• Download the source code (C/C++).
• Video playlist where in the first two minutes I install Mineways, export a model from our Minecraft world, preview the result, and then upload it to Shapeways. To see some results, let that video playlist play. Tutorials:
  • Mineways tutorial: 3d print cleanup
• Mineways Flickr group. Best photo so far: this one (not made in Mineways, but it could have been).
• Minecraft forum thread
• Other discussions: reddit thread, and a related reddit thread; Blender thread.
• My modest (non-profit) Shapeways shop shows some buildings I’ve exported and purchased, mostly for friends. You can look at photos, check prices, and download the models themselves.
• Our world’s homepage