Well, there's been some discussion on the Build Service list about GNOME stuff and, since that's a matter of public record through the archives, I'm going to mention a few things that are happening/will happen.

Firstly, there will be two 'official' Build Service repos. These will be called GNOME:STABLE and GNOME:UNSTABLE. You can probably work out what will be contained within them. The core GNOME packages that are included in numbered distro releases go in here. STABLE contains the versions that are in the current stable GNOME release and UNSTABLE those which are in the current unstable release. We, the GNOME team, will maintain these

In addition to these there will be GNOME:Community. This will, finally, replace the old usr-local-bin repository that I run, hosted elsewhere. It will contain packages that are not, currently, part of the core distro package set. I'm guessing we're going to be open to other community packagers being added to this.