Web 2.0 is changing public relations, journalism and media--rapidly. Social media is changing the way news and information is delivered and received, the way companies interact with their customers, the way public relations professionals interact with journalists, the way advertising is delivered and the rate at which a message, from a consumer, blogger or company, can travel. In short, once again, this changes everything. The world post 2.0 is about instant and constant communication and interactivity. Twitter and Facebook are only the beginning. The internet made it so if you can't link to it, it doesn't exist. Today we have to ask, if you're not using social media to interact with your customers, who is? Are you ready?