Virtual Server 2005 and x64
I saw a newsgroup post this morning on this and wanted to re-iterate the point here.
Starting with the release of Service Pack 1 for Virtual Server 2005, you will be able to host 32bit guest operating environments on x64 hosts. What this means is that you will be able to utilize all the features of the Virtual Server product in their current form on the x64 operating system.
This also means that we currently do not support virtualizing a 64bit guest, so you wont be able to do any virtual testing of x64 inside of these VMs. That wont happen until later releases of the Virtual Server product as they are going to need to recode the application to simulate a virtual 64bit machine instead of the 32bit environment we simulate now.
Joseph Conway, x64 beta lead, Microsoft