While its all fine to have private clouds built to keeping security in mind, there is an argument that many of the benefits of cloud computing go out the window the minute a CIO runs a cloud behind their firewall, as Amazon has cogently argued. While its evident that the cloud providers had to have a soft speak to convince CIO's to assure data security behind private clouds, i guess the flexibility of having a combination of public/private clouds as main/burst capacity and viceversa appeals more to organizations and CIO's today along with cost benefits that it provides.
Tier 3, providers of an agile, self-optimizing enterprise cloud platform to enterprises large and small said they are seeing first-hand how their customers are increasing business agility by leveraging enterprise hybrid cloud computing. Infact Tier 3 has recently presented a webinar on hybrid cloud and how it is enabling business agility, view the replay below a recent hybrid cloud webinar (presented by Tier 3 in collaboration with VMware and Equinix).
Increasing Operational Agility with Hybrid Cloud