Looking for someone to write a guide on "Social Networking".? Content will be used in a book on web site design, so this is just a generalized introduction to social networking sites such as facebook, myspace? and others and should have an in depth introduction to the top social networking sites, features/functionality and comparison - essentially this guide should give the reader a good, comprehensive instroduction to social networking, descirption of the major social networking sites, features and functionality and how social networking can help a business or individual and thier web sites.? In addition, I would like to have summary information on how social networking can improve web site traffic and can be used to complement existing or new web sites.