As for it working with MediaLab v2008, it looks like it's working problem free (assuming of course that DirectRT runs the same session problem free on its own). There have been a few reports of a delay in the startup/onset time it takes for an embedded DirectRT session to boot from within MediaLab but that seems so far to be the exception rather than the rule.
We will continue to monitor whether that is something that is continuing to occur but as we rely on user feedback, I can say for now that it seems like a safe combination. Of course, you are welcome to try it out on one of your machines in advance if you'd like to be extra-sure!