A bunch of interesting Twitterers aggregated in NYC a couple of days ago at the 140 characters conference, discussing various aspects of and uses of Twitter. One of the sessions was about Twitter and Science, led by @thesciencebabe and @jayhawkbabe. I am very jealous I could not be there, but we can all watch the video of their session:
Happy to see the last slide, with @PLoS as one of the recommended Twitter streams to follow for those interested in science.