As Z said, IW is primarily a gaming site - it's where we get the bulk of our hits and where we get the bulk of initial sign-ups. Forums go through a attrition and rejuvenation process over their life cycles - our rejuvenation process is tied in to game releases to an extent. Though because we've managed to establish a culture over the past few years our attrition rate is not as high as other forums - you only have to look at how many active members we have here who started in 2001 to see that people do stick around, though they may not post as much.
When BG2 was released this site had the biggest spike of new members in its history, followed by when NWN was released. Each release of a new game which Z features on the main site is accompanied by an uplift in memberships. When NWN 2 is released we'll see another spike.
My excuse for not having posted lately is that I've just moved to Boston where I had no internet access for almost a month. Scary thought, eh.
