A new version of the National Library of Medicine Drug Information Portal was released in October 2008. See this announcement. The portal is an OA resource of information on over 16,000 drugs.
Posted by
Gavin Baker at 11/21/2008 06:55:00 PM.
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.