[Air-L] Literature on Social Networking Privacy Design?

Hi Folks, I'm researching how differences in design across social networking websites affect users' privacy decisions (what information to disclose and to who), and could use some help finding the relevant literature. In particular, do any of you know of works that address differences in social networking design across sites (as a research variable or otherwise) or that discuss the various decisions and considerations that go into designing a social networking site? Thanks in advance for any and all help, Best, Sam -- Sam Gilbert Research Assistant Project Zero, GoodPlay Study Harvard Graduate School of Education