This is particularly aimed at Matt since he has experience with installing mpi4py on an altix :-) I saw your post on the mpi4py list (http://tinyurl.com/ybnb6p7), but I'm running into another problem.
Ahh, I remember writing those from a very lonely, dark room in Garching... :)
ImportError: /home/astro/jwise/local/lib/python2.6/site-packages/mpi4py/MPI.so: undefined symbol: MPI_Comm_get_name
What's ldd /home/astro/jwise/local/lib/python2.6/site-packages/mpi4py/MPI.so report? And can you try running with the python2.6-mpi executable, see if that helps?
If you haven't run into this problem before, maybe you (or someone else) could give me some tips on tracking down the mis-config. I haven't debugged something like this before...
This is a bit new to me, as well... maybe it's turning down some library loads because of conflicts? What happens if you set LD_DEBUG (maybe to 'files' or 'bindings' -- but 'help' should clear up what's available.)