Personally I feel a need to meet Drupal colleagues to share information, discuss problems and listen to solutions for all aspects of Drupal.
It could also be quite a learning moment to invite speakers who have extensive Drupal experience, e.g. someone like Pierre Guillaume Wielezynski, who leads the WFP Web Team.
Anyone with any other suggestions? Please let us know so we can make some kind of planning, invite speakers and prepare the first meeting.