I have issues running Win2k8 R2 RTM as a host and Win2k8 R2 RTM Guest OS's. Attempting to copy an ISO file from a share on the Host OS to a share on the guest OS from my Desktop PC (Win7 RTM) causes the Host PC to completely lock up.
I've read in the ESX Forums of people having similar issues with the networking, and some suggestions that there may be an issue with the E1000 Driver included in WIndows 2008 R2. I've attempted to Manually change to the VMXNET (Not VMXNET3 as VMware Server 2.01 Console says its not supported), however still had the same issue.
Hardware wise i've changed everything (Mobo, CPU, HDD, PSU, HDDs, you name it rofl) trying to figure out what this problem is, however it appears its a software issue.
So still trying different things, as i was hoping to put this VMware Host Machine into production in the coming Weeks (But could be delayed now).