Libraries should harness new web technologies like Facebook, Twitter, YouTube, and blogs to promote the modern library to their thousands of patrons. Facebook has over 750 million active users who spend 700 billion minutes per month on the site, allowing library pages to potentially reach large audiences. Twitter sees over 500,000 new accounts daily and archives all public tweets in the Library of Congress, demonstrating its value in sharing information. Embracing these technologies can help libraries engage more patrons and promote materials and programs to thousands more people.