Our new Cool Friend Chris Brogan is a social media expert. He uses tools like Twitter to help organizations build relationships. In the interview, Chris discusses the advantages of social media tools along with the responsibilities that are associated with having a large audience and how attention is a form of currency. His book, written with Julien Smith and to come out in August is Trust Agents: Using the Web to Build Influence, Improve Reputation, and Earn Trust. Here's his interview, and, of course, you can find Chris blogging at his own website and on Twitter at twitter.com/chrisbrogan.