Mineblend

Mineblend is an addon for Blender that enables you to import your saved Minecraft games into scenes that can be edited, rendered, animated, etc. The most recent release is 1.6.4 and basic functionality has been tested with Blender 2.7.1 on Windows, Mac OS X, and Linux. You can download either the ready to use addon or get the source code from github

For the latest discussion about Mineblend check out the blenderartists thread (click the 'last' navigation button to see the most recent posts) or on Google+

Latest release notes

• The most common terrain and building block types should now be textured correctly when using Cycles. Over a dozen new block types added.
• Reworked material nodes for easier end user material customization without programming.
• More useful default settings for import dialog.

Limitations:

• Due to the large amount of geometry, it is recommended that users with less than 4GB of GPU RAM use CPU rendering for the time being. (TODO: reduce amount of geometry in a future release)
• It can't load additional data after first load. (Requires a fresh blank .blend / Blender restart after every load, as it can't currently cleanly append region data to existing meshes.)
• MC block definitions do not currently process certain extra-field data (torch directions, crop height, track/ladder orientation)
• Additional work still needed for vegitation, steps, and fractional blocks

Miscellaneous

Full release notes and a bit of history for those that are interested.