"Some people think the cloud is just a hard disk in the sky...," said Jobs at Apple's Worldwide Developer Conference. "We think it's way more than that and we call it iCloud. ... iCloud stores your content in the cloud and wirelessly pushes it to all your devices. ... Also, it's completely integrated with your apps, so everything happens automatically and there's nothing new to learn. It just all works."

Cloud [1] consists of nine applications: iTunes in the Cloud, Photo Stream, Apps, Books, Documents, Backup, Contacts, Calendar, and Mail. It's available now in beta form for Mac OS X and iOS developers; general release is scheduled for later this year, in conjunction with Apple's planned launch of iOS 5, the next iteration of its mobile operating system.