Found this interesting, if for no other reason than as proof that the world at large is thinking about the implications of moving even past Web 2.0 and on to Web 3.0
(My apologies -- while I have referenced the article as translated by Babelfish, the original article is in French so the English may be a bit choppy; the ideas seem to remain intact, however, and the author's speculations about the future of the Web are interesting).
Original link, for those who read French: http://pro.01net.com/editorial/506930/que-nous-prepare-le-web-3-0/
Speaking of Web 2.0, this article takes an interesting viewpoint. While these sites have changed the way we communicate, they're not exactly raking in the money for their owners.