As you know, with the advice of Red Hat Legal, Fedora is actively protecting its logo and trademark (and we have some real problems in this area. As a consequence, the logo usage is not as Free as we wish, we must apply some restrictions.
One of the ideas to make this easier, an idea which as the moment is not agreed, was to produce a secondary logo, created by the community and used by the community with no restriction in usage. If this idea will ever get steam, I think this night in the bunker I discovered the perfect graphic for it (if you look at those pictures will see the sign practically everywhere):
...if you want to know more about the meaning of this sun-shaped sign, ask our Czech friends :)