Just to show that running free s in GNU free on Debian PPC is easy I though I'd say how.
!. don't add contrib or non-free to your sources.list
Install the libre kernel.
Here if yo want to compile
http://www.linux-libre.fsfla.org/pub/linux-libre/releases/
Here if yo want a stable lenny .deb
http://people.debian.org/~rmh/linux-libre/pool/linux-2.6/
done.
ok@debian1333:~$ vrms
No non-free or contrib packages installed on debian1333! rms would be proud.
ok@debian1333:~$ uname -r
2.6.26-libre2-2-powerpc
ok@debian1333:~$