We are having exact same problem with our VMware Virtual Machine running W2008 server. It is about 4 weeks old and no problems until yesterday when its locked up twice! Someone suggested it was a SMB issues. SMB v2 on W2K8 and V1 on XP. It caused us major headache so we dont' want it to happen again.
No announcement yet.
Windows 2008 on a VMWARE server unable to map drives to XP clients.