The idea is to gather together the world's clinical trials, published and unpublished, and provide OA to their results. When launched, the ICTRP contained 50,000 trials from the US, UK, Australia, and New Zealand. (Thanks to ResourceShelf.)
From the ICTRP front page:
The mission of the WHO Registry Platform is to ensure that a complete view of research is accessible to all those involved in health care decision making. This will improve research transparency and will ultimately strengthen the validity and value of the scientific evidence base.
The registration of all interventional trials is a scientific, ethical and moral responsibility.
Once a trial is registered, full transparency and accountability requires that all of the trial's results be made available to the public in a timely manner....
Posted by
Peter Suber at 5/08/2007 10:51:00 AM.
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.