There is a new survey online that is attempting to get some information on atheists and atheism around the world.
It will take about 20-30 minutes depending on how much information you want to give. No personal information is collected.
I think this is a great opportunity for us to gather some data on the atheism movement worldwide, and if you associate with the atheist community please get involved and go fill it out.
There is a discussion about the results at http://blogs.elon.edu/servingatheists/