Web 2.0 and Testing

I think that social media is going to change all the rule about testing. Besides the obvious, psychometric reliability, validity and legal defensibility who is the "authority" or subject matter experts? Who should the certifying body be? In the world of Web 2.0 the is much more emphasis on group opinion than top-down thinking. Doesn't that change who should decide what goes in a certification exam then? The implications are staggering. Who is in charge of authorized content? Look at Wikipedia as an example... this mysterious body of experts declares what is relevant, what needs citations etc. And its all self governed. If we think that this trend will not affect testing we are kidding ourselves.