Which software is the render coming from Maya 3dsmax or can you send the job from MR standalone? I'm not sure in MR stand alone will do it, I've never tried that before. BUT you could use BackBurner it comes with 3dsmax (maybe with Maya also now?) You'll need to install it on each "server" or render node you want to use…
I think it still runs into the same issue, a bake is one frame of one job and doesn't distribute to more then one node. Unless MR can farm out each bucket and stitches them back together... which I think is possible with some software, but not sure how to do it or if MR stand alone even does it =/ The cool thing I've found…