Web 2.0 - design guidelines

I was googling to find some resources about web 2.0 design trends. I say web 2.0 design trend because the web sites' designs have changed drastically since the introduction of web 2.0 services. I found this as a good article on the topic.

web 2.0 how-to design style guide

It gives good explanations on the changes to the web design with examples and some links to more information.

Web 2.0 awards - 2007

seomoz.org says, it has reviewed and ranked hundreds of web 2.0 sites and awarded the best sites under 41 categories; 3 places (first, second and third) exist per category. Interviews with the founders of some winners have been hosted.

Digg (Social News), LinkedIn (Professional Networking) , del.icio.us (Social Tagging) and Technorati (Blog Guides) are among the winners.

Check out the list:
SEOmoz's Web 2.0 Awards