However, as you point out, Thomas, there are many different forms of privacy with the ‘Virtual Private Cloud’ and the *totally* public cloud at the extremes of that spectrum. User’s requirements concerning privacy (and other many other ‘qualities’) may be in fact be extremely complex (and constantly changing). At Arjuna we think that the key to creating an effective market for the cloud is the ability to capture complex requirements, and the support for sevice agreements that represent contracts between consumers and providers and which deliver a full audit of performance against those requirements. Without the ability for consumers to define what they require, and for arbitration against what is actually available, the cloud will be constrained to support for the particular niche types of services and applications explicitly supported by vendors.

The ability to express their requirements will give cloud consumers a voice.