Nathaniel,
Great post. The last time I had a conversation about Web 3.0 (a few months ago) the consensus was that it was all going to be about vertical social networks; mini facebooks for specific interest groups/communities. While I think there is some truth in this, it's exciting to hear a prediction of something a bit more dynamic than 'just another facebook'... I hope that we at ClearlySo can generate an offline community of meetings, phonecalls, contracts and deals as well as all the online stuff. It reminds me of those animations where you see the words or ilustrations of a book lifitng off the page!
All the best
Julia