Despite the certainty expressed in these predictions, the transition to cloud computing from in-house IT infrastructure and traditional outsourcing is really just beginning. By the end of 2011, public and private cloud services will generate 15% of worldwide IT spending. There is a long, hard road of difficult transitions and adoption decisions still ahead. Right now, however, is when Cloud Service Providers (CSPs) need to position themselves, their offerings and their future development strategies for the rapid changes to come. Likewise, business users of cloud services require immediate insight into the benefits and risks of cloud computing - along with how to exploit the former, while avoiding the latter - as they adopt this "New mainstream" IT approach.