newsreaders | Social Signal

Think of a social network, and you probably think of something like Facebook, LinkedIn, MySpace or Bebo. (If you're especially old-school, or Brazilian, you might think of Orkut.)

Either way, you're thinking of a capital-S, capital-N Social Network. You join it as a social network, probably with the initial intention of connecting with people.

But some social networks can kind of sneak up on you. You think you're there to do something purely solitary, but then something happens...