I just mailed the June issue of the SPARC Open Access Newsletter. This issue takes a close look at the University of Maryland faculty vote rejecting a proposed OA policy. The round-up section briefly notes 165 OA developments from May.
Update (2:00 pm EST). There seems to be a problem with the list software today. For the time being, the email version is stuck in one of those internet tubes, and you'll have to make do with the web version.
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.