VMware just released three key products:
GSX Server 3.1.0, VirtualCenter 1.1.0 and Virtual Infrastructure SDK. This means two things:
-) centralized management of virtual environments is mature enough to handle large, middle and small production environments fitting any customers needs.
-) virtual environments are finally open to customization, leveraging and improvements. At this very moment third party virtualization companies can really start to heavy invest on this technology seeing some concrete returns on investiments.
So be ready: a virtual infrastructure is coming near you.