Arguably one of the most discussed and chased after markets within the computing, communications and software industries, cloud computing continues to occupy center stage in the thinking of users, press, analysts and equipment vendors. Although often referenced as "The Cloud," cloud computing represents a broad mix of components and technologies each of which has a crucial role to play. From networking infrastructure to seas of compute and disk servers and a broad set of specialized software the total market for cloud computing continues to expand rapidly. According to the Yankee group, global revenues for 2010 totaled $37.8B and by 2015 that will have grown to $121.1B. SaaS (Software as a Service) continues to represent the lion's share of this growth and along with the infrastructure of the data center is the hard center of any fluffy cloud.