Meredith Farkas' book Social Software in Libraries: Building Collaboration, communication, and Community Online has been published by Information Today. In addition to the book, Meredith has a web page with relevant resources.
Named one of the 2006 Library Journal Movers and Shakers, Meredith has done much to advance the cause of social networking tools in libraries. Many people know her from her wikis, which she has built in order to demonstrate how we can benefit from them (as well as contribute to them).
By thew way, if you're going to the Computers in Libraries conference, Meredith will be doing a book signing Tuesday evening during the reception.