No it doesn't - never has. On the list of "maybe someday", but not enough interest out there to warrant any near-term effort.
On Aug 15, 2010, at 12:20 AM, James R. Leek wrote:
> I just need to confirm that openmpi 1.4.2 doesn't support nested invocations of mpirun. I found a previous mailing list message the that effect, but it referred to 1.3.3. I really need this functionality, so I wanted to make sure openmpi doesn't have it before I start doing desperate things.
> users mailing list