Earlier today we noted the times for the release of iOS 6, and now it is available as a download over the air or within iTunes. On your iOS device, go to Settings–>General–>Software Update. The update is 599MB and contains over 200 new features. I suggest doing a full backup before you update.
Oh, and Apple still needs to update its iOS page on the website. It still says iOS 6 is ‘coming soon’. Let us know how your update goes!