While g.d.o is headed towards a Drupal 7 launch on commons there is still some room for improvement of the Drupal 6 version of the site. As of November 7th, a new feature exists for fighting spam.
All "Editors" and "Spam fighters" on the site can now flag nodes and comments as spam. All Editors will see a block in the sidebar that shows any nodes or comments that has been flagged. They are encouraged to confirm the content is spam and then block the spammers.
These flags are not available to all users of the site as they look a bit ugly. That is blocked by a bluecheese theme issue. If anyone can work on that it would be great.
If you would like to help identify spam, please ask for the spam fighter role in #drupal-groups on irc or a comment here.