Cloud Computing is regarded by many as the new revolution in the IT industry. Analysts and media alike have generated significant ‘buzz’ around the term and the technologies it describes, reporting multi-billion market developments. All the major players of the IT Industry (IBM, Microsoft, Sun, HP, Cisco, etc.), pure Internet players (Google, Yahoo, Amazon, Sales Force, ...) and telco operators have developed their own “cloud” offering. Alliances have been formed to prepare and position for Cloud Computing that have multiplied to cover the entire IT landscape and value chain. This array of alliances within the industry has however brought considerable confusion to the cloud. As a result, most CxOs do not clearly see the benefits and risks associated with it, and many CIOs have already become cautious about the real benefits of Cloud Computing.