The blogosphere's talking about Web 2.0. I wrote a response in John Robb's comments to the question : "what are the three big themes of web 2.0?".

My take is that it's basically BangTheRocksTogether (which is about finer-grained addressing and the more numerous recombinations allowed) plus TheFlowInternet (automation of flow).

It all depends on open, remixable data, of course. And interestingly, there's no ThoughtStorms page devoted to that. The fish never sees the water ;-)