Directory of Open Access Journals in Philosophy
A webpage by Steven Harnad, with some very useful resources.
Peter Suber maintains excellent resources including an overview of open-access publishing here, and a page maintaining recent news about open-access publishing here.
Here is the Berlin Declaration on Open Access to Knowledge in the Sciences and Humanities.
Blog Discussions
Here is a discussion of open-access publishing on Brain Leiter's blog
And here is a slightly more recent discussion on tomkow.com blog