Good read: 'Cloud computing: why all of the vehemence?' by Dan Kusnetzky.
Short break out:
"It would be wise of IT and facilities practitioners to focus on where and how new technology or new approaches can be of use to the organization rather than trying to fight them. Mainframes, minicomputers (now called midrange systems), distributed computing, client/server computing and the like are still found in nearly all medium to large organizations. They didn’t go away when a new approach or a new application was adopted."
I did comment it but it seems like the comment was removed. Really don't know why, it really wasn't controversial. Well, it might appear again later. Sometimes it takes a couple of hours.