I just wanted to announce that the new kd-Tree rendering framework is now in the 'yt' branch of the repository. There are a couple things I wanted to point to if you are interested.
The changeset itself: http://yt.enzotools.org/changeset/c7947fef16ac/
A post on blog.enzotools.org highlighting some recent successes: http://blog.enzotools.org/amr-kd-tree-rendering-added-to-yt
A simple script, where you should just have to change the parameter file name: http://paste.enzotools.org/show/1367/
A more advanced script that exposes a few new options: http://paste.enzotools.org/show/1368/
Both of these scripts should be able to be run in parallel (as long as N is a power of 2 for now) transparently as:
mpirun -np N python script.py --parallel
Parallel performance will depend on the structure of your data, but the docs for the Camera object have some suggestions.
If you find any problems or have any thoughts, let me know!