[Air-L] Bibliography on Semiotics of web communication

Dear all, I am working on the bibliography for my new class on Semiotics of web communication at University of Torino, Italy. Do you have books/articles (but also websites/blog) to suggest, that I could add to my list? Good tips are always welcome! Please note that I will focus on web campaigning and e-mobilisation, and the use of social networks to engage citizens. Many thanks, Daria -- Daria Santucci, Ph.D. Torino, Italy skype dariaonline twitter dariatweet