its called digg.com and about a dozen other sites I've seen. You could even build most of this in Ning for free, right now. My point being that I don't see an

its called digg.com and about a dozen other sites I've seen. You could even build most of this in Ning for free, right now. My point being that I don't see anything in there that really evolves the social content sharing platform in any significant way.