Apple Releases iOS 6: Available To Download Now
It's the same OS that was touted back at WWDC, refined and ready for mass release. It brings Passbook (but not to the iPad), a Do Not Disturb function, new sharing options, integrated Facebook, additional Privacy functions and FaceTime over Cellular, just to name a few things.
Sadly, you'll need to download the 1+GB file a few times over if you have different iOS devices (the same download won't install on both your iPhone and iPad), but you might as well get it started while you grab some coffee, no?