How much time do you spend trying to keep with all your friends on the various social platforms? Chances are it's quite a bit. Most of your friends are probably on Facebook, some are hard die heard Twitterers, and some won't let go of MySpace.
Friends isn't available just yet, but it's rumored to be hitting the App Store within the next few weeks with a price tag of $2. This is really how most apps should integrate with social.