I have visited hundreds of XF forums over the past year, checking out styles and how admins set up their forums, to gather ideas. I have noticed that very few XF sites have a "main site" associated with their forums (I do). So I am curious who has a main site, who doesn't, and the reasons for your decision. If you do have a main site, does it help sending traffic to your forums? I'd be interested in hearing any feedback.