As of 4/30/12, the Open Access Bibliography: Liberating Scholarly Literature with E-Prints and Open Access Journals by Charles W. Bailey, Jr. has had over 500,000 file requests. Of those file requests, over 439,000 have been page views (either XHTML files for bibliography sections or PDF files for the entire bibliography).
In 2005, the bibliography was published by the Association of Research Libraries in print form, and ARL released an open access PDF file as well. The author then added a web site for the bibliography.
All versions of the bibliography are under a Creative Commons Attribution-NonCommercial 2.5 License.
In 2010, the author released a second version of the bibliography, Transforming Scholarly Publishing through Open Access: A Bibliography, as a PDF file, a paperback, and a web site under a Creative Commons Attribution-Noncommercial 3.0 United States License. While the first version of the bibliography had a very wide range of included material, the second version, reflecting the rapid maturation of the field, primarily included books and published journal articles.
Since digital publication in 9/9/10, the second version has had over 153,000 file requests. Of those file requests, over 132,000 have been page views.