You'll be interested to read Chris' post about the release of System Center Virtual Machine Manager 2007. This first version is for managing VMs and apps within Virtual Server 2005. The next version of SCVMM will manage VMs and apps running within Viridian/Windows Server 2008. But not only that, Chris' team is building the next version of SCVMM to also manage VMs running on ESX Server/VI3 and Xen. Here's part of what Chris wrote:
Our next release is planned to coincide with the release of Windows Server Virtualization (codename Viridian) so that we can expose all the great features it provides. In addition to Viridian support – we are also adding some key customer driven features. We have heard loud and clear from customers and partners that we need to manage other virtualization environments in addition to Windows virtualization. They want a single management solution that manages all the different hypervisor technologies. So – in our next set of releases will be adding support for non-Windows virtualization environments – specifically VMWare and Xen. We listened to you!!! And when I say we will manage these environments I mean really manage them – covering all the key scenarios they offer. From a single console and a single command-line you will be able manage Virtual Server, Viridian, VMWare and Xen.