One of the great feedback on 'Cloud' that I heard in the recent past... is to look at cloud as a way to do genuinely new things -- or in Tonsetic's words, "change their business capability."
Most of the times we get struck with conversations on public/private etc, but the scenarios that I see everyday in my business capacity is is actually radical. These comments can't be any more true:
http://www.informationweek.com/cloud-computing/infrastructure/cios-consider-skipping-private-cloud/240151042