The main purpose of Orocos.org is provide a central information point for users and developers. Drupal helps a lot in realising this, by providing access to many types of content. Recently, registered users can manage their Orocos or Orocos-dev mailing list subscriptions through this site. A nice feature, but not as powerful as having the messages of the lists right here on-line, searchable and reply-able. Drupal has a mailman-Forum module which claims to do that trick. The main concern is limiting SPAM of course and a captcha module may prove to be necessary.

A promotion of the 'search' feature of this site might be required as well, as too little people use it to find content directly.