Bureaucracies temporarily suspend the Second Law of Thermodynamics. In a bureaucracy, it's easier to make a process more complex than to make it simpler, and easier to create a new burden than kill an old one.

Amateur production, the result of all this new capability, means that the category of ‘consumer’ is now a temporary behavior rather than a permanent identity

So forget about blogs and bloggers and blogging and focus on this - the cost and difficulty of publishing absolutely anything, by anyone, into a global medium, just got a whole lot lower. And the effects of that increased pool of potential producers is going to be vast.

The loss of control you fear is already in the past.

The future presented by the internet is the mass amateurization of publishing and a switch from 'Why publish this?' to 'Why not?

Think about spam filters; if email didnt come from someone that someone you know knows, thats an important signal, and one we could embed in the environment; we just dont. I just want the world to be filtered through my social graph.

A Wikipedia article is a process, not a product.