Hindawi Publishing, with 10 open-access journals, has launched an institutional membership program. Authors affiliated with institutional members may publish in Hindawi OA journals free of charge. A one-year membership costs €2000. From the web site:
[3] There is no limit to the number of articles that can come from a particular Institutional Member. [4] An Institutional Membership for 2006 will apply to all papers that are accepted for publication during the year 2006. [5] As an incentive to sign up early, institutes who join Hindawi's Open Access Institutional Membership program this year will be given a free membership for the remainder of 2005. [6] In addition to the Open Access journals currently published by Hindawi, the Institutional Membership will also apply to any Open Access journals that are added to our collection during 2005 and 2006. (We expect to add around 15 new titles by the end of 2006.)
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.