From Clay Shirky

What matters is this: Diversity plus freedom of choice creates inequality, and the greater the diversity, the more extreme the inequality.

At the head will be webloggers who join the mainstream media (a phrase which seems to mean “media we’ve gotten used to.”) The transformation here is simple – as a blogger’s audience grows large, more people read her work than she can possibly read, she can’t link to everyone who wants her attention, and she can’t answer all her incoming mail or follow up to the comments on her site. The result of these pressures is that she becomes a broadcast outlet, distributing material without participating in conversations about it.

Well, does it have to broadcast? What is Slashdot then?

Meanwhile, the long tail of weblogs with few readers will become conversational