Prototype - Cloud Computing - So You Don’t Have to Stand Still - NYTimes.com

What, you may be thinking, is cloud computing? Basically, it means obtaining computing resources — processing, storage, messaging, databases and so on — from someplace outside your own four walls, and paying only for what you use.

It’s a mushy term that is being applied loosely to many things on the Web. Salesforce.com is now called a cloud application — after all, companies let it store their sales data, rather than running it on their own systems. Facebook, too, is a cloud platform, because software developers write applications for it and distribute them on it.
Prototype - Cloud Computing - So You Don’t Have to Stand Still - NYTimes.com

This is a must read article. For marketers, you need to draw a line from computing services to content delivery. The entire media space is moving toward a "cloud" structure in which the content (or equivalent of software) resides in the "cloud" from where any one of us obtains it "on demand." Get it? Not yet?! Then read this.