Next week, Apple is supposed to announce plans for what it's calling iCloud. Based on everything that I've read, iCloud is going to be a replacement for MobileMe, it's online synch service that allows you to share your email, contacts and calendars online. It's also supposed to be something of an online "locker" for all things related to iTunes.
Both Amazon and Google have similar cloud computing options for your digital media, as well as other kinds of cloud computing options. For example, you can save your documents, spread sheets, photos, even calendars on Google's servers instead of on your computer.
This recently revived the debate online about the need/want for cloud computing.
Cloud computing is nothing new. You save or back-up documents that you want to an online hard drive. That way you can go to any computer, anywhere in the world, access those documents and save them online again if you wish or print them off or whatever. Cloud computing frees you from having to carry around external hard drives (which your dog can eat) or thumb drives (which can get lost in the cushions of the couch).