Social Library? Sign up for this online course if you want to learn all about it.. "Five Weeks to a Social Library, the first free, grassroots, completely online course devoted to teaching librarians about social software and how to use it in their libraries." And if you're not one of the lucky 40 participants who will be expected (or if you don't have time), know that "course content will be freely viewable to interested parties and all live Webcasts will be archived for later viewing."