I can't wait to get the VI Toolkit for Windows. It's PowerShell cmdlets that let you manage VMWare. To get an idea of what you can do with PowerShell and ESX Server, check out the Automating VMware with PowerShell Lab Manual, from the VMworld Europe 2008 conference. You will be able monitor the status of VM's on the ESX server and be able to control the VM's remotely. I'm curious to see of you would be able to take a running VM offline and move it to a storage volume. That would make my life easier.
The VI PowerShell Blog mentioned that the VI Toolkit will be Beta this month, I can't wait to get a hold of it.