The IR-Managers website...is a resource and communications tool for librarians, programmers, and other professionals running digital repositories, with an especial focus on institutional repositories (IRs) in colleges and universities in the United States.
Although IRs are a focus of the various movements toward open access to the research and scholarly literature, this site is not intended for open-access advocacy. Although IRs are the focus of much technical investigation, this site is not purely technical. Instead, it is a gathering-place for people doing the immediate day-to-day tasks involved in planning, setting up, running, and recruiting content for IRs.
Nice touch: the forum doesn't let spambots register but neither does it make you prove your humanity by reading an illegible string of letters and retyping it. You'll only have to answer a question about open access.
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.