The original forum was created on October 24th, 1999 by Auspex Turmalis for The Antioch Chronicles. It was the only forum actually hosted on the Antioch web site (at Tech-Base). It existed for about a year before various technical oddities started popping up, eventually killing it on August 22nd, 2000. After a brief dead period, the community packed and moved to CoolBoards (then to EZBoard, then to Ashenvale, then finally to Antioch Forever).
The original forum was also the only Antioch forum to use a threaded (rather than flat) model and not have user accounts (with post counts, avatars, and so forth). It was probably based on Matt Wright's then-ubiquitous WWWBoard script or one of its derivatives.
Forumers that have been around since the original forum are generally understood to be cooler than everyone else.