Here are some in depth answers from two people working on open access: Peter Suber, Director of the Harvard Office for Scholarly Communication and the Harvard Open Access Project, and Elizabeth Silva, associate editor at the Public Library of Science (PLOS).
Open Science Collaboration Blog.
Harvard Office for Scholarly Communication, Director of the Harvard Open Access Project, a Faculty Fellow at the Berkman Center for Internet & Society, Senior Researcher at Scholarly Publishing and Academic Resources Coalition (SPARC), Research Professor of Philosophy atEarlham College, and a non-practicing lawyer. His most recent book is Open Access(MIT Press 2012). For more information, see his home page.
The paperback edition is still available as well.
Text Mining and Scholarly Publishing by Jonathan Clark, independent advisor on strategy and innovation. Prior he worked with Elsevier for 20 years in various roles in publishing, product management, technology, strategy & business development. Clark is a former Chair and Director of the International DOI Foundation.