MPI implementations

[Daniel Nogradi]

I plan to use python parallel and -- fortunately or unfortunately --
there are several implementations. At the moment I'm aware of

http://datamining.anu.edu.au/~ole/pypar/
http://pympi.sourceforge.net/
http://www.fysik.dtu.dk/~schiotz/comp/PythonAndSwig/pythonMPI.html

and wondered if anyone had experience with any of them. Pros, cons?
Did anyone try more than one?