Over at the NASW.org archives, their cybrarian did a summary of science blog sites.  And in case "Science2.0" isn't hot enough, we find science3point0.com (yes, that's their moniker):

Another social networking site with appended blogs is Science 3.0, which "combines the hypothesis based inquiry of laboratory science with the methods of social science research to understand and improve the use of new human networks made possible by today's digital connectivity."
There's also some good coverage of Hank Campbell at Science 2.0 (aka here), though, alas, no mention of the "SciencePrevious+1" battle to get the highest ranking.

Myself, I'm into 9th level Science, Science9.0.  Catch up, folks!

Alex

Tuesdays at The Satellite Diaries and Friday at The Daytime Astronomer (twitter @skyday)