The November issue of Kunstchronik is devoted to open access. The issue is not itself OA, at least so far, but Klaus Graf (who conceived the issue) expects that all the articles will soon be self-archived. Watch his version of the TOC for links to OA editions of the articles, as they become available.
These articles from the issue are already OA:
Klaus Graf, Kulturgut muß frei sein. An argument for OA to digital images of cultural heritage objects, free even for commercial use.
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.