This article demonstrates how Facebook, a popular social networking Web site, provides libraries with the opportunity to develop an outreach presence and information portal within an online community. While much of the recent literature examines Facebook and defines its potential use within libraries, this article focuses on the use of Facebook's newest feature: customizable Facebook Pages. In December 2007, librarians at the State University of New York at Buffalo began exploring the use of Facebook Pages to virtually reach out to patrons and market library services. Based on user response and Page statistics, librarians found the use of Facebook Pages provided a welcome extension of services and a unique form of outreach that reached beyond the campus community. Through a University at Buffalo Libraries Page on Facebook, librarians can update and inform students, faculty, and staff of new events, workshops, library services, and resources. Librarians at the University at Buffalo maintain an active online community that reaches more than 300 fans. Fans provide discussion and feedback regarding library services, offering a more interactive extension of the Libraries homepage. This article explains the design process, including the use of third-party and custom applications. Challenges, ideas, and user response in regards to the use of Facebook Pages in a library setting are also presented. (Contains 7 figures.)