I've just read a fascinating piece on how professional writers might engage with audiences (or prosumers) using social media. Alison Boyle's project is described on Write4Children here, and raises thought-provoking issues about social networking in general. There are some familiar themes, such as the observation that most online networks are extensions of offline ones, as well as interesting observations about language conventions and building an audience. She also points to the limitations of the common tendency for brief commenting; comments that may be positive, but don't actually help you to refine your ideas. I was also struck by the short consideration of ratings, as used on Quizilla and the implications of applying crude mathematical algorithms to content on SNSs.