Last year at VMware 2008 conference they discussed something called vCloud. Before VMware 2009, they will be announcing external clouds providers around that platform which allow internal clouds to extend their infrastructure to external clouds.
What VMware is trying to do is allow organizations to build cloud networks with the possibility of moving few services/components to external clouds.
To make this seamless the VMware vSphere tool which currently allows internal cloud management will be enhanced to allow it to manage instances on the external cloud almost as if it was part of the internal cloud. In fact if the rumors are true, they will even support vMotion across to external cloud providers (restrictions apply).
VMware is getting on the cloud bandwagon in a big wayâ€¦ just take a look at the number of sessions they have mentioning cloud.