Cloud computing users range from individuals and small businesses to Fortune 500 firms and governments. According to a September 2008 survey from the Pew Research Institute, nearly 69 percentof Americans use cloud computingservices (such as webmail and on-line data backup sites).3 In India,companies such as Ashok Leyland, Tata Elxi, Bharti, Infosys,Asian Paints, and Maruti are either piloting or using cloud computing.Additionally, nearly 1,500 companies in India already use blended (voice-chat-data) cloud based communication services from vendors such as Cisco WebEx and Microsoft.4 The US government projects that between 2010 and 2015, its spending on cloud computing will be at approximately a 40 percent compound annual growth rate (CAGR) and will pass $7 billion by 2015.5