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