I have not tested VIBE with W2K8, but there should be no direct correlation to the Windows environment except through whatever VMware tools are installed (for either Windows Server release). W2K3 definitely works but again, it depends on whatever Sync driver you are using.
If you want to avoid VMware snapshots and that problem altogether, you can use the --novmsnap option. Also note that not doing VMware snapshots is not best practice as it does not leave the VM in a traditionally consistent state as far as VMware is concerned.
Please let me know if you have any other issues. Thanks,