iOS users can now download the long-awaited iOS 6, which adds over 200 new features to Apple's operating system.
The big ones Apple has been pushing include new Maps, Siri improvements, Facebook integration, shared photos streams, Passbook, FaceTime over cell networks as well as WiFi, new calling features, a redesigned mail offering, Safari improvements and more accessibility features. Here's the big feature rundown. Here's Apple's "What's New" page.
As of today, you don't need an iPhone 5 to get a brand new iPhone experience. While the iOS comes in time for the September 21 iPhone 5 shipping date, it is also available for the following devices: iPhone 3GS, iPhone 4, iPhone 4S, iPod Touch (4th and 5th generation), iPad 2 and The New iPad.
You can learn a lot more about iOS 6 by perusing our various articles on it here.
Let us know what you think of the OS in the comments.