Foundation for Cloud Computing with VMware vSphere 4, by John Arrasjid, Duncan Epping, and Steve Kaplan, is now online for members and available for purchase. Virtualization is recognized as a foundation for Cloud Computing. This book is an overview of the VMware technologies and how they can support the various services and management pieces required for Cloud architecture. Without diving overly deeply into specific design patterns, it provides insight into the tools to fit your design criteria.
http://www.yellow-bricks.com/2010/01/28/foundation-for-cloud-computing-with-vmware-vsphere-4/
