[By 2025] the majority of new scientific research results will be freely available in permanent digital archives shortly after initial production or publication, thus fueling additional scientific discovery and encouraging the development of a wide range of value-added commercial products and services.
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.