How do you describe Web 2.0? More comments

More interesting comments on Web 2.0 and definition of:
Richard MacManus (who will be in the Bay area momentarily) likes my post and has good words of his own.
Silkworm blog says: “I believe Web 2.0 is like many other things, that are compared to love – you can’t satisfactorily describe it to anyone but you know when you are in it.”
Dion Hinchcliff has a round up of comments, including Jeff Veen on giving up control on the web,
Josh Porter on web 2.0 as an era of interfaces, and the Unauthorized Microsoft Weblog on Microsoft’s recorg and the wish to address 2.0 themes (and opportunities).