There is also httpov -- http://columbiegg.com/httpov which works very nicely for
me (using the google computing services and amazon aws - a bit expensive!).
PVMPOV, similar to MPIPOV -- http://pvmpov.sourceforge.net isn't really
maintained any more for the last 11 years or so (but it still compiles nicely
with the recent gcc versions)..
Hth, Jakob
