As you may know, I am presently working on a rather involved social network. It is currently built on Drupal 5.x, and we are considering moving up to Drupal 6.x. In order to do this we have to asses which of the "crucial" modules have been ported to 6, and the amount of work involved in those that haven't. So this post will have 2 purposes. First, to comment on what I feel are the "foundational" modules for a social networking site using Drupal.