Among plenty of other things, Apple announced today that iOS 6 will launch on September 19th, just in time for the September 21st release date of the iPhone 5. More on all of the iPhone 5 details here.
iOS 6 has over 200 new features, compared to iOS 5. You've heard about all of this already, but it includes things like new Facebook integration, Passbook, new Apple Maps, etc. See all of our iOS 6 coverage, dating back to its announcement here.
The next version of Apple's operating system was first unveiled at the company's Worldwide Developers Conference in June. Later that month, the company released a second beta version to developers.
They really pushed the Facebook integration at today's event. The new iTunes for iOS actually comes with a Facebook like button. This also comes out on the 19th.
In addition to the iPhone 5, iOS 6 is coming to the iPhone 4S, iPhone 4, iPhone 3GS, New iPad, iPad 2, and iPod Touch (4th and 5th generation).