Digital research data must meet five quality criteria:
The research data can be found on the internet.
The research data are accessible, while taking into account ruling legislation with regard to personal information and intellectual property of the data.
The research data are available in a usable data format.
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.