Creative Commons: GPL-Copyleft versus Share Alike

[Wouter Vanden Hove]

Last Fosdem the FSF gave the Free Software Award to Larry Lessig for the 
advancement of Free Software.
But what is the official stance of the FSF's on the Creative Commons 
Share-Alike License?
http://creativecommons.org/licenses/by-sa/1.0/

It is a copyleft license, but it for software the GPL is much better.
I understand the Creative Commons is targeted mainly at other 
disciplines of works,
but the Creative Commons says nothing about software.
Shouldn't the Creative Commons be urged by the FSF's to include the GPL 
as their preferred copyleft software-license?


Wouter