I stumbled upon a cool SNS: Rupture. The idea is so simple: automated bragging about your achievements in games. This proves that there is still room for SNSs after all 
It got me thinking though: this isn’t some divinely inspired idea, I could have come up with that! But hey, I didn’t. Why not? Because I’m not a gamer (no Blockles, don’t cry: I wasn’t talking about you, I was talking about other games). You get ideas in the areas that interest you because that’s where your head is at. Keep your focus on that.