I would be remiss if I did not mention that David Sifry recently published an analysis of the influence of blogs versus the big media sites. Influence on the online world is measured by the number of inbound links which is a core strength of Technorati.
Not only is it interesting that 6 of the top 15 sites are blog sites, Kotokke notes that only 16 of the top 100 are without advertising.
Conclusions? That blogs are holding more sway over online opinions and that almost all of the most popular sites are ad supported.