Open and Shut blog
http://www.eurekajournalwatch.org/index.php/Main_Page
Peter Suber has an introduction and maybe more material on OA
Kosmix!
The Access Principle: The Case for Open Access to Research and Scholarship (Digital Libraries and Electronic Publishing) by John Willinsky
Open Access: Key Strategic, Technical and Economic Aspects (Paperback) by Neil Jacobs (Editor)
nLab page on Open access