Cory Doctorow, author and open source advocate, has designed an economic and research project that I find very interesting and will be following with interest. He has previously published using both a traditional publisher while also using a Creative Commons license. There has been some anecdotal evidence supporting his claims that this is viable and economically feasible (and frankly, his example influenced me heavily in my decision to use a CC license on both of my books on Moroccan culture). There has not been any experimentation to prove the assertions nor to silence the criticism he has at times received.
This experiment has great potential to either lend credence to the assertion that one may both use CC licenses and publish for profit concurrently or it will add some weight to those who argue against it. Either way, I’m interested and I think the experiment is well designed.
Take a look.