The University of North Texas maintains CyberCemetery, an OA archive of digital documents from defunct US government agencies and programs. From an article about it in Pegasus News:
Don't bother asking UNT librarians to remove sensitive but not classified information on the CyberCemetery. They'll refuse. "It's for the people of this country," said [Cathy N. Hartman, assistant dean of digital and information technologies at UNT Libraries] of the CyberCemetery's free and open access. "It belongs to the people."
Posted by
Peter Suber at 12/21/2006 08:26:00 AM.
The open access movement:
Putting peer-reviewed scientific and scholarly literature
on the internet. Making it available free of charge and
free of most copyright and licensing restrictions.
Removing the barriers to serious research.
I recommend the OA tracking project (OATP) as the best way to stay on top of new OA developments. You can read the OATP feed on a blog-like web page or subscribe to it by RSS, email, or Twitter. You can also help build the feed by tagging new developments you encounter.