A private Cloud looks and acts like a public Cloud, giving your corporation all the speed, agility and cost savings promised by Cloud technology, only it's single-tenant, and that tenant is you, right? Well, that's the goal, but it's not quite the reality yet for most enterprises.
According to Piston Cloud Computing's CTO, the rate at which his customer's pilot projects turn into production private clouds is pretty typical of most OpenStack-based providers – and it's pretty low.
OpenStack -- co-founded by Rackspace and NASA in 2010 -- certainly has the buzz, what with partnerships with AT&T, HP and IBM, to name a few, all of which have promised to use OpenStack as the base for their private cloud offerings.