Indiana U. has added another service to the Open MPI web site: a fully
indexed and searchable database of Open MPI source code trees.
There's a link under "Source Code Access" entitled "Searchable source
tree" on the OMPI web site that takes you to https://svn.open-mpi.org/source/
(get the CA cert from http://www.cs.indiana.edu/Facilities/FAQ/Mail/csci.crt
to avoid SSL certificate warnings from your browser).
This site, powered by OpenGrok, is a "wicked fast" searchable database
of both the Open MPI SVN trunk and v1.3 release branch.