From Clay Shirky, one of the more eloquent commentators on the increasingly participatory nature of the internet:
Digital and networked production vastly increase three kinds of freedom: freedom of speech, of the press, and of assembly. This perforce increases the freedom of anyone to say anything at any time. This freedom has led to an explosion in novel content, much of it mediocre, but freedom is like that. Critically, this expansion of freedom has not undermined any of the absolute advantages of expertise; the virtues of mastery remain as they were. What has happened is that the relative advantages of expertise are in precipitous decline. Experts the world over have been shocked to discover that they were consulted not as a direct result of their expertise, but often as a secondary effect — the apparatus of credentialing made finding experts easier than finding amateurs, even when the amateurs knew the same things as the experts.
Also try his speech on Gin, Television, and Social Surplus — this is where he compared time spent watching TV with time spent building wikipedia.