One of the most intriguing and useful features in Twitter is the "retweet" facility. If you see something in your tweetstream that you think might interest others, then you can click a button to make it visible to the people who are following you. Retweeting has become so commonplace that its conventions have already been the subject of a serious study by the anthropologist Danah Boyd and her colleagues at Microsoft Research. But it turns out that retweeting is not just interesting in terms of discourse analysis
via guardian.co.uk