Do also realize that IW is growing; we're getting close to 5000 members here, and the growth is going to explode once Wiz 8 and Neverwinter take off. Of course, not all of them are active, but a lot of them participate in the various gaming forums.
Gen Con is a strange bird. It doesn't appeal to everyone, and there's generally something here that will offend at least someone.

I'd say less than 10% of the IW members actively participate in Gen Con, and that's a pretty stable percentage. For those of us who love it and appreciate it, it's a rolicking good time. Still, we do what we can to expand its interest.
Cheers to IW's growth, and may it continue to prosper!