Great news, and it’s finally coming to our production environments (it was the buzz @ Tech Ed 2008 in Barcelona for Hyper-V next at that time together with Live Migration): Dynamic Memory allocation comes to hyper-V in Windows Server 2008 R2 SP1. This is a great and most welcome addition! We can adjust memory allocations on the fly with down time from a memory pool on the host, memory virtualization if you will. Grab the announcement here: http://blogs.technet.com/windowsserver/archive/2010/03/18/announcing-windows-server-2008-r2-and-windows-7-service-pack-1.aspx