Princeton Theological Seminary and Microsoft yesterday announced a partnership to digitize the school's public domain library holdings. The digital editions will be OA through Microsoft's Live Search Books service. The collection includes "religious texts from the early history of printing, editions of John Calvin and John Knox, writings of the Puritans, and hymn verses of Isaac Watts." See the announcement from Microsoft or Princeton.
Microsoft will give the Seminary digital copies of all the materials and allow them to be shared with noncommercial institutions and nonprofit organizations ...
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.