2009/1/16 Philip Sandifer snowspinner@gmail.com:
Your choice of CC-BY-SA, which, at least for now, closes off use of Wikipedia content (and visa versa). It seems silly to start a free content encyclopedia and then render yourself unable to share content with a rather large project already underway in that area.
-Phil
Given the phrasing of the relicensing section of the GFDL 1.3 using it on a new project would be a really bad idea. At this point if you copy work from wikipedia then people modify it you cannot use the relicensing section to shift the modified versions over to CC-BY-SA-3.0.