Last year I did a comparison between Drupal and WordpressMU in terms of how both relate in terms of the multi-user blogging experience. The conclusion was that WordpressMU had all the bells and whistles and that it was clearly more experiences in terms of end-user friendliness and usability, but that it lacked the much more mature technical implementation that Drupal could offer. I made it my personal battle plan to set up an installation profile for Drupal, developing any missing modules in the process, to bring the best possible multi-user blogging platform both in terms of usability and technical stability. I dubbed it DrupalMU.