I collect articles on scientists using blogs and twitter. Mostly because it’s relevant to my dissertation, but also because I find them interesting. You can see a listing here: http://www.delicious.com/cpikas/meta_science_blogging (used to be displayed on my UM page, but that broke in the transition).
So one of these articles that I saw tweeted by about five people at the same time is Wolinsky, H. (2011). More than a blog. EMBO reports 12, 1102 - 1105. doi:10.1038/embor.2011.201 .
Of course it starts with the arsenic life discussion. It talks about the immediacy of the blog reaction and the tone of the discussion on the blogs. Overall a nice article.
I think the subtitle of the piece is unfair. It acts like the title of this post when the article itself is more about where blogs have evolved to right now. There are a lot of differing experiences with blogs and differing uses, some of which have always been talking shop.