If you are heading into 2008 thinking, we must do more with social media, here is a useful primer to social news websites.

From the post:

Social news websites generally operate via a wisdom of the crowds principle; groups of individuals with different points of views are able to collectively determine the value or importance of content disseminated through the community. The users are given the editorial power to influence the visibility of content.

It is written from a marketing point of view. But maybe journalists should think more about how to reach audiences in a fragmented media online environment.