Matt asked me to share some recent volume renderings that I've made, along with the scripts to go with them.  I've posted one such example here:

Beware the movie is about 260 MB.

This is a fairly small simulation but is a good example of what the volume renderer can do.  I've implemented an "embarrassingly" parallel script that allocates one datadump/viewpoint to each processor.  Here each of the 1717 frames can be partitioned and rendered in about a minute for a 1024^2 image, meaning that on 16 processors this took about 2 hours.  If you have questions about how the script works, please let me know.  

Cheers,

Sam