The new issue of Library Hi Tech is devoted to Academic information services: new paradigms, the presentations from the Bielefeld conference of nearly the same name (February 7-9, 2006). Here are the OA-related articles; only abstracts are free online, at least so far.
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.