There is not single "Creative Commons"
license. The project allows you
to pick the attributes you want, and then gives you a license that
covers them. In the case of the PLoF, they have only chosen to require
attribution. A summary of their license is here:
http://www.plos.org/journals/license . It allows modifications for any
purpose, and since they have not opted for a copyleft clause, derivative
works can be released under any license, including the GFDL.
That said, we still probably won't be able to include much. PLoS
publishes journals, and journals publish new research. As an
encyclopedia, it is beyond our scope to publish research that has not
yet gone through extensive peer review.
Stephen G.
The article I did, What Controls Variation in Human Skin Color, was more a
summary of other research than original research.
Fred