Ethan Zuckerman on methodological challenges in social media research.
bq. Someday, we’ll see a methodology section in a paper that debates the merits of logging onto a system while naked to get a more representative sample…
For context, see “here”:http://www.ethanzuckerman.com/blog/2010/03/01/chatroulette-survey-long-bookmark/. Also, as Ethan notes, this is an intriguing chart (even if I am sure that Andrew Gelman will have many useful suggestions as to how it could be improved).