Richard MacManus has had two articles on the ReadWriteWeb blog about the emerging web trends of 2009 at:
http://www.readwriteweb.com/archives/something_new_in_2009.php (part one)
and:
http://www.readwriteweb.com/archives/web_trends_whats_new_in_2009_part_2... (part two)

Here are the posts:

Web 3.0 or Not, There's Something Different About 2009
Written by Richard MacManus
May 20, 2009

Cision Europe CEO Peter Granat spoke about the future of PR & Technology at Media Relations Summit 09. There's a good summary in Bulldog Reporter at:
http://www.infocomgroup.net/falkow/?p=570

Here's the post:

Where Do We Go Next?

We’re all aware that Web 1.0 is over and we’re trying to get up to speed with Web 2.0. So what’s around the corner with Web 3.o?