at headrush.typepad.com
Kathy Sierra knows what she's talking about. "Creating passionate users" is an excellent blog.
In short, it says that the best thing about Web 2.0 is that no-one knows what it means. It forces people to fill in the blanks themselves, and come up with their own vision of what "the next iteration" should be.
The best examples of these are the side-passes that involve a lot of people saying "Web 2.0 isn't that, it's actually this". Fact of the matter is all of the ideas are becoming part of the mix of new ideas that are being thrown around. Even the naysayers complaining about the nebulous hype are keeping the discussion grounded in real benefits and preventing us from partying like it's '99.
So, I guess we should keep the discussions going.