Man, having some major problems with my rig. Since I built it, every once in a while, I'd loose total network connectivity to both the host and all VMs. It was still running, just no way to connect. It was rare enough that I didn't worry about it too much. I was using the onboard realtek NIC, which I know people had reported problems with, so I bought an Intel dual NIC and use that instead, but no change.
Well, I just set up PLEX on another VM and now it is happening every night. I installed the WHS2011 client on that VM and it backs up nightly. Going to disable the nightly backup and see if that might be causing the increased problem at least. I've posted on the VMWare community forums, but it took well over a week to get even a response and nothing was particularly useful so far. Very frustrating.