Geva Perry has put together a post titled Why (and What) Every Business Exec Needs to Know About Cloud Computing. It's a response to a Twitter question from a Harvard Business School professor wondering whether cloud computing should be included in an MBA course. Geva argues that cloud computing "is as much a business phenomenon as it is a technological one. Most industries will be affected by cloud computing as it catches on and is embraced by the mainstream."
Plenty of non-MBAs may find Geva's article useful as an executive summary of some of the issues and benefits of cloud computing.