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The social media fast lane is heating up with real-time location updates. Apps now tap into your cell phone’s GPS to track where you and your friends are, and, more importantly, what’s happening nearby. Now that the world can finally say “tweet” with a straight face, there’s a new term to learn: MoSoSo, or mobile social software. Read on to find out what it is, how it works and how to setup your privacy settings.