While not a brand new phenomenon, online social networking sites continue to be exceedingly popular and seem to be where students spend much of their time. Not only are participants blogging, texting, chatting, sharing files, gaming, and existing virtually online, they also are forming communities and new cultures and exhibiting new informational needs. While this may be intimidating, librarians, particularly those in public services, need to be aware of these sites and be open-minded to the possibility of offering traditional library services via these new online mechanisms. The sites reviewed in this column have been selected as quality examples of social networking sites that have great potential for use within libraries, enabling library professionals to better collaborate with one another and reach out to patrons. Specifically, the reviews address sites offering conferencing and general networking opportunities. [For part II, see EJ877364 .]