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Facebook settings are embedded into the Settings menu. You can set vibrate and sound notifications and switch on/off high-definition video recording.
iCloud now includes Safari support, allowing tabs to be sync'd across iPhones, iPads and Macs alike. It also includes support for Passbook. There's more on Passbook later.
Do Not Disturb is a new feature to enable users to fully switch off from their iPhone or iPad when they're asleep or in a meeting. It completely silences the phone, though notifications are still there when the user gets back to it.