Open Access Overview by Peter Suber
An excellent introduction to open access by one of the foremost proponents of this movement.
Timeline of the Open Access Movement
An extensive timeline highlighting the major events in the open access movement from 1966 to the present.
Open Access Publishing and Citation Archives: Background and Controversy by Genevieve J Knezo
Congressional Research Service report for Congress outlining the major issues relating to open access publishing.
Institutional Repositories, Tout de Suite by Charles W. Bailey, Jr.
An introduction to institutional repositories with links to related resources.