Thanks to Ron for pointing these links out again.
Back in March, Sun announced its membership in the OpenMPI community. A side effect of this effort is that OpenMPI and Grid Engine interoperability will get serious high level attention. Ron also provides a link to a Sun HPC presentation PDF where there is explicit mention of creating an “SGE Plugin for ORTE” — the Open Run Time Environment within the OpenMPI distribution.
If this makes rolling out a tightly integrated Grid Engine / MPI Parallel Environment (PE) a bit easier then everybody wins.