Cloud Computing

Last few days, I've been digging into concepts of cloud computing. Ton's of information on the net. But I'm still searching for that "aha" moment, where it all adds up and makes perfect sense for my organization either

a. to use a cloud(Saas, PaaS or IaaS)
b. or to become a cloud aggregator !.

I've come across a couple of interesting articles that distinguish clouds as seen/required by startups and those as seen/required by big enterprises. "Enterprise Cloud Computing"(if I can term it that way ;-) ), is certainly my focus area. On to more digging..and I'll keep you posted of my findings.

Do let me know if you can point me to some good source on this topic. Greatly appreciated.

~M