SEOmoz, a Search Engine Optimization specialist offers SEO tips and guidance through their web site at www.seomoz.org. They’ve also just released the results of their Web 2.0 Awards competition, the results of which can be found here.
What’s interesting and very useful for web entrepreneurs is that there are a lot of categories covered, each with 1st, 2nd and 3rd places, and a grading system for Usability, Usefulness, Social Aspects, User Interface & Design, and Content Quality.
The breakdown of 174 sites in 41 categories helps to drill down to sites that are similar to yours making it easy to compare and pinpoint what you should improve for your web site.
Check out the awards site at http://www.seomoz.org/web2.0