iOS 5 might be the most popular version of Apple's mobile OS yet. When Apple released it as a digital download through iTunes on Oct. 12 the heavy demand almost crashed Apple's servers.
Available for the iPhone 3GS, iPhone 4, iPhone 4S, and all iPads, this update includes more than 200 enhancements for a reasonable price--it's free. This visual tour focuses on 11 major enhancements and four new apps introduced with iOS 5.
Apple's cloud service for iOS 5 devices, iCloud, offers many of the same services as the MobileMe service it replaces, plus some new ones, such as Photo Stream and Documents in the Cloud. Sadly, it doesn't have MobileMe's popular iDisk or website hosting services.