JRV, JRE is only really used by MDS's browser push service, if I remember correctly (maybe something else; someone mentioned it here or someone from RIM emailed me about it).
Just curious, since you said this server was also a DC, whats the physical memory load like on this server? I can only imagine that LSASS is sitting at around 500-700MB or more. Add in the BES services to that and you have a constant 1.2GB physical memory charge. Is there another server with less than half the robustness of this one that you can move users to?
In the beginning the Universe was created. This has made a lot of people very angry and is widely regarded as a bad move.