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First things to ask yourself, what is "Cloud Computing", so far the explanations have just seemed to be virtualisaition.
To me, cloud computing is a computing concept, not a product. Virtualisation is a often a key component of cloud computing, but it is not the only component. You have IAAS (Infrastructure As A Service), PAAS (Platform As A Service), an SAAS (Software As A Service), these are all different cloud computing models that can be interelated or distinctly seperate.
I look at it as an approach to computing that leverages the efficient pooling of on-demand, self-managed, virtual infrastructure, consumed as a service.
Backup, stoarge, availability, networking, security, resource contention, cost and standards are all valid concerns for both physical and virtual worlds, it is just a matter of who, what, when, where and how.
If you want to get more specific about what you want to achieve, I am happy for a chat.
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