There is probably an outdated information on GnuPG keys at http://gcc.gnu.org/mirrors.html
The newest gcc 4.4.0 (gcc-4.4.0.tar.bz2) is signed using a key not listed on this page (key ID C3C45C06). I think it's worth to fix this information. -- Damian Pietras http://www.linuxprogrammingblog.com