Coping with the deluge of information is a major challenge for students, scholars, librarians and the general public. After all, with thousands of online newspapers, blogs, and academic journals, Google Books digitizing millions of titles, massive amounts of information coming online each day, major innovations in content management, and the ubiquitous impact of e-mail, YouTube, Facebook, Twitter and other new technologies, we find ourselves awash in petabytes of information of widely varying quality.