VMware released several documents part of the Reference Architecture Kit which helps in designing a private or public cloud environment based on VMware vSphere and vCloud Director.
The vCloud Reference Architecture white papers help existing vSphere users understand what it takes to build a vCloud, both public and private clouds.
VMware vCloud Implementation Example: Private Enterprise vCloud
VMware vCloud Implementation Example: Public vCloud Service Provider
More resources like videos, blueprints and brochures on VMware vCloud Director can be found here http://www.vmware.com/technical-resources/products/vcloud-director.html