Competition

I've recently pitched a project idea that revolves around social networking strictly for teenagers. I envision having features that allow for user feedback, with reviews, ratings and recommendations. Based on the feedback I want to be able to tell people overall what's popular, what's actually "good," and calibrate people's tastes. Essentially, I'd like a charting system similar to Last.fm's, that could also conjure recommendations based on other users who share particular likes or dislikes.