iOS 6 brings a lot of new features with it, including granular Privacy controls in Settings. Given previous controversies surrounding apps accessing your contacts, it's important to make sure that only apps you specifically allow have access to your contacts, and only for as long as you allow it. With Privacy, you can grant and revoke permission to access your contacts at any time.
What do some popular iOS apps to with your Contact data? Do they grab it without permission, transmit it without protection, and store it without regard to privacy? Or do they treat it right, with respect and responsibility?