Say what you will about the candidates' performances at the recent CNN/YouTube debate, but one thing was obvious: Web 2.0 has gone mainstream.

It is now officially recognized as a major media channel. And judging by the near-unanimous opinion that the questions were far more interesting and insightful than the responses, it's safe to say that the rise of Web 2.0 marks a new era of public discourse. Conversation, not content, is now king. And with that comes an opportunity for ...