My company is a large global enterprise and we're using things like flash storage arrays and putting everything in a VM, but with the main asset of the business being intellectual property, the data will NEVER go in the cloud. There's already enough distrust internally with audits and non-disclosure agreements and such. We have certainly embraced the private cloud idea and replicate data to other continents like the big cloud storage vendors, but there will always be at least a small level of distrust because of the intellectual property.