Multiple Experts Try Defining "Cloud Computing

jg21 writes: Even though IBM's Irving Wladawsky Berger reports a leading analyst as having said recently that "There is a clear consensus that there is no real consensus on what cloud computing is," no fewer than twenty attempts at a definition of the infrastructural paradigm shift that is sweeping across the Enterprise IT world can be found here — some of them really quite good. [From the article: '"Cloud computing is...the user-friendly version of grid computing.' (Trevor Doerksen) and 'Cloud computing really is accessing resources and services needed to perform functions with dynamically changing needs. An application or service developer requests access from the cloud rather than a specific endpoint or named resource.' (Kevin Hartig)]