Having been around, mainly as a lurker, since almost the inception here's my take:
Show the world all the "new traditions" & fads that have arisen from here (OOD, Optimus Klein, Fear the Beard, etc.) as well as the quality blog content that is posted by _Fan and lastly, mention the open, un-moderated style of the forum and how it lends to the best discussion.
Just my two cents. HTH