Despite a recent claim to the contrary which reached this forum, there
is still one logo which is non-free. The Debian Official Use Logo is
still only distributed under a restrictive and confusing license. The
information on the website is still up-to-date:
http://www.debian.org/logos/index.en.html
What *has* changed is the situation of the Debian Open Use Logo flavor
with the word "debian". This flavor is now also free, meaning any flavor
of the Debian Open Use Logo can now be distributed in main.
That being said, the Debian Official Use Logo, the only non-free logo
remaining, is rarely used. Its status is being discussed:
https://lists.debian.org/debian-project/2012/10/msg00002.html
Note that our logo terminology can be confusing (see
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=689756 for details).