Microsoft have release Windows Server 2008 images for both Hyper-V and Virtual Server.

Go grab the Windows 2008 goodness! Each set of images come in two flavours, Full and Core.  If you want to know more, go check out the Microsoft Website, and a snippet is below:

VHD Images for Microsoft Virtual Server:

VHD Images for Microsoft Hyper-V:

I’ll download a copy as soon as I can, and convert them to VMDK’s (using converter) and see how they run under ESX.

PS:  Mental note, I’ll also read the EULA too, and see if anything virtualization vendor specific pops up