So, essentially ...
... the kiddies at Amazon are finally figuring out the 1960s Mainframe model.
What people are calling "Cloud Computing" culminated in IBM's SNA in the '70s. IBM milked it out thru' the '90s, but even by the mid-80's it was considered archaic by most.
I mean, seriously ... Purchase a PC with more power than all the IBM mainframes in the mid-80s combined, pay for an OS in the purchase price, purchase an Internet connection for connectivity, which in turn allows access to all the free software in the world ... and then pay someone else to store your data & host your applications?
Who does this at home (corporate environment)? Are they stoned, stupid, or both?
As for corporations trusting other corporations with data ... Get back to me when Amazon, Google, IBM, Yahoo!, Sun and HP are trading "cloud services", m'kay? Until that happens, this is all marketing twaddle, separating fools from their money.
Give it up, already. The entire "cloud" meme is getting old.