Researchers at the University of Virginia found that the intensity of your smile in Facebook profile pictures can predict your future happiness. It might be time to delete that angry-sexy thing you've going.
Social analytics tool Topsy now indexes Twitter in its entirety and allows users to look up their earliest tweets since 2006. Go forth, and use it to embarrass your friends by exposing their inability to understand Twitter back in the day.
Why sign up for an online dating service when you can sub-Spotify? This new trend allows you to passive-aggressively declare your crush-dom for someone else in a totally subtle way - just like you might with your Netflix queue.