Today was the big day. Take a look at the latest here: http://www.apple.com and see keynote, and look here for two entries posted today: http://www.apple.com/hotnews/
Prez Art Gorski sends along this link http://arstechnica.com/apple/2013/09/apples-overhauled-ios-7-is-coming-september-18-to-an-idevice-near-you/ , with his comment, "In just over a week, your iPad or iPhone will have a software update to iOS 7. This will be a total makeover, changing the look of just about everything, and adding some new features. It will take a little time to get used to it all, and hopefully Apple will provide some tutorials for users."