I feel like this is a great learning project, but that there really isn't a niche for this kind of opining that hasn't already been filled by Twitter, Reddit, Facebook, etc.

But go ahead and prove me wrong!

On the site itself: You do a good job of explaining how to use everything, but the layout is really complex, and I don't think most users will be engaged enough to try and learn it all before being able to use the thing.