Hi Danah, Thanks a lot for the lists! They are very useful indeed! I am also conducting my research on Twitter (its linguistic perspective) and have a couple of articles in press. As soon as they are published, I will be glad to add them up to your bibliography. Will keep it in mind! Thank you very much again, Best wishes, Anna Ivanova PhD Candidate English Language Department University of Seville, Spain ivanova.re@gmail.com