A good guide for researchers looking to get into Social Media:
Cann, A., K. Dimitriou, and T. Hooley, Social Media: A guide for researchers, 2011, Research Information Network, UK.
Available for free download at:
http://www.rin.ac.uk/our-work/communicating-and-disseminating-research/social-media-guide-researchers
Along with lots of links and resources.
About Shirley Williams
Shirley Williams is a National Teaching Fellow and Professor of Learning Technologies at the University of Reading. She is involved in a number of research projects related to learning technologies, communities, social networks, Digital identity and knowledge transfer.
She also enjoys reading and cooking.