Surveys of experts in other fields (economics, physics, biology, etc.)
This is really a superbly interesting survey. I can't wait for the additional analyses to be published!
I've seen this kind of thing done for the economics field, too, but I would love to see it done for the sciences. For example, what proportion of neuroscientists or physicists are dualists? What proportion of each are theists? What proportion of physicists accept Copenhagen vs. Many Worlds vs. other interpretations of quantum mechanics? That would all be very interesting to know.
Many thanks to David Bourget and David Chalmers!