Enterprise are starting to adopt cloud computing. The ones that have web centric business models like media companies are either already doing it or are moving towards it rapidly. Financial services companies are moving slower, as compliance/API security issues have to be carefully looked at.
Michael Healey recently wrote “8 questions to ask before going live in the cloud“. Good read. We see customers going through this general thought process:
- what is the business driver (generally time to market or costs) ?
- what is the ‘pilot’ application (new application are easier)
- select team, infrastructure/platform provider.
- focus on the security/compliance/visibility
- deliver project
- measure ROI (generally not required, as it is obvious)
- move to mission critical application
Most enterprise cloud applications are being driven by business/IT folks are focused on helping their business counterparts on time to market. it is important to approach w/ caution, but try to jump in fast…the water feels fine after you are in 
. No big bang approach about replacing data centers etc., just start with baby steps.
