Riiight... except this really doesn't have anything to do with cloud computing. This has to do with hackers breaking into systems which was very common prior to cloud computing and it has to do with corporate espionage prior to that before computers even existed.
Cloud computing isn't really the issue, the issue is security in general.
Unless I'm mistaken, the hacker managed to access @ev's email account and through there a number of other web services. While these are general security issues, they are used primarily by Cloud Computing services across the www. And as long as they exist, no reputable corporation will consider getting on board.