With online social networking sites becoming some of the most visited destinations on the Web, organizations from all countries have been scurrying to establish their presence on sites like MySpace, Orkut, and MSN Spaces. In this arena, the social networking site Facebook has become the world's most popular social networking Web site. Through its Facebook Pages service, introduced in 2007, businesses, performers, brands, public figures, and non-profit groups may establish free Facebook organizational profiles to which individual users may post comments, engage in discussions, share videos and photos, or merely identify themselves as so-called "fans." Facebook provides similar opportunities to libraries around the globe--and similar challenges. As with many commercial enterprises trying to find their footing in the Facebook environment, academic and public libraries worldwide offer examples of both promising strategies and struggling endeavors in their execution of Facebook pages. Many articles have examined U.S. libraries' Facebook efforts; this article highlights some non-U.S. libraries. (Contains 1 figure.)