Systemwide Sharing Sheets have been changed. Gone is the list view; now you get an icon and text. Depending on the context and what's being shared, you have options to share using Mail, Messages, Twitter and Facebook. There are also options for Printing, Copying, Bookmarking, and saving the link for offline viewing via Reading List in Safari.

Facebook integration means , much as Apple did with Twitter in iOS 5. You'll now be able to share photos and Safari links on Facebook from within the respective apps using the Share button. Among the apps already updated to take advantage of this are Safari, Game Center, iTunes and the App Store, where you can share app reviews with Facebook friends. No doubt, developers will move quickly to add Facebook integration in their own apps now that iOS 6 is out.

Reminders gets a small, but welcome, addition. In iOS 5, you could set location-based reminders from anything in your contacts, but in iOS 6 you can now manually enter locations using the Map app. And since third parties should also have access to Reminders info, should be more useful, too.

FaceTime, Apple's popular video-conferencing app, can now be used over cellular networks -- with an important caveat: Your carrier needs to support this feature. In the U.S., Sprint and Verizon allow FaceTime calls over cellular with existing data plans; AT&T, in an attempt to annoy even more customers, only allows this with Shared Family Plans. Thanks, AT&T.