[Air-L] Looking for lit on SNSs and politicals

Hi all! I am looking for literature on social network sites and politics (election, voting, activism, access to politics information, political process, etc.) as part of a project we're starting here at MSU. Work that looks specifically at SNSs (as opposed to the Internet in general) would be especially helpful. Although academic research is preferable, well-done popular press references are also welcome. I'm happy to summarize and re-post to the list. Thanks much! Nicole