(No, I'm not going to talk about the details publically quite yet. Suffice it to say, the existing social-conversation system is a crucial component, but the money comes from expanding our horizons a bit. If we can do it right, I think we can pull off the hat trick of providing real value to users, making real money, and not doing anything evil in the process.)
We'll see if it stands up to some reflection, and we'll see if we can pull it all off, but if I can get everything arranged right, I think this might actually work...