The points about blogs are interesting on another front. With thorough blogging and thorough syndication, the experience of the web becomes more thoroughly decentralized. People produce and publish information-- it's good to have so many people writing because it makes them reflect, synthesize, and articulate themselves. The tools then aid the flow of that information by adding metadata, searching for relevant relationships, aggregating feeds, and presenting it to others. It's barely even a hub-and-spoke model because the ends of the spokes only see the hub if they're wandering.
Tim Bray recently told Mac users to stop using their web browsers to read the web and pick up NetNewsWire instead. A feed aggregator certainly adds a lot to the experience (and NetNewsWire has relegated my Safari auto-tabs to the dustbin), and my fears that I would stop finding new feeds haven't come true, so I guess it's a good thing. I think that they're still tools to be used in concert, though.