Regarding the forum, I think the content is great. Looking back on old threads, users who've asked questions, received detailed answers. I think that's the bread winner with this forum. Keep an eye on the fluff and toss it before it because a nuisance and keep providing quality information.
If there is anything I can suggest, the forum can use a facelift. I know you're limited due to vBulletin, but bringing this website to 2012 standards would be nice. I'm positive a new look will bring more members.
If you build it, they will come!