How to determine virtual machine host name "virtual server"

Recently had a problem where the lab folks forget where my VM was installed to and I needed some RAM added to it.  I needed to find the physical host name of the machine the VM was running on.  Turns out that there is a handy dandy reg key one the VS devs pointed out to me:

 HKLM\Software\Microsoft\Virtual Machine\Guest\Parameters\PhysicalHostName

Hope it helps someone, I spent quite some time trying to figure it out on my own.