The idea of moving part of gnome.org to Drupal is consolidating slowly. This process is starting to happen and hopefully during next year we will have a gnome.org homepage delivered by a Drupal tool.
A doubt that comes to mind is the election of Drupal or CivicSpace as the basis for this platform . Or the combination of both if possible, since we are planning a multidrupal installation to manage different subsites. By default going to the source (Drupal) seems to be the right election when, as clients, we need to assure stability and reliability in the older (and bigger?) project and community. On the other hand, we want to make a good use of CiviCRM and maybe other cool community focused add-ons CivicSpace offers. But CivicSpace header still says "beta" and a big and complex web project like gnome.org requires to maximise stability and minimise the risk of trouble.
Also the Drupal step from 4.6 to 4.7 is big and we are in the right time to start working on the top of 4.7, so when we are able to release our beta website Drupal 4.7 will be fully stable (core and modules). How CivicSpace is dealing with the complex step between these two versions is another factor to consider.
Just thinking out loud to get some input that could help us making a good decision. If more key factors are missing let us know. I have read many Drupal <-> CivicSpace docs and threads here and in http://civicspacelabs.org/ , but they were mostly generated months ago so I thought I'd better ask.