Virtualization with an American twist.  EMC’s VMware is the market leader in virtualization technologies.  Their role in Cloud service data centers is increasing quickly.  The ability to install, backup, replicate, or move virtual images between platforms and data centers themselves has become commonplace.  Another major player is CA whose AppLogic product provides similar capability.  See San Diego vendor ScaleMatrix as another significant vendor.

VMware: VMware vCloud Blog: Another VMware Cloud – Gratifón Runs Their Hybrid Cloud on VMware