A long long time ago I voiced about the need for a wiki in the Gentoo project. In those days Gentoo-Wiki was starting up.
For some reason or other people inside the project felt that having the users producing documentation was a bad idea. For some other reasons that I never understood the gentoo-wiki.com becamed a banned issue, and Gentoo developers were advised not to mention, and not to link to him. I wrote an extensive article about Gentoo on the Efika board that got some raised eyebrows because it was written on the Wiki.
Now Gentoo Wiki has been down for a few days. And according to the backup page it does not seem a fix is going to happen soon.
If we had taken this project under an umbrella a long time ago our users would not be missing on this very important resource.