I have a few more suggestions after browsing your site a little deeper...
-Not to be confused with anything above, but the inproper English used on the forum desriptions is a really big pet-peeve of mine and makes your site look unprofessional in my opinion.
-Your forum names, while semi-creative, are extremely random to me, and often the name doesn't relate to the subject of the forum. It kind of makes it confusing and hard to browse.
-A main site, even if its just your standard IPB Portal. You could always come up with something creative to just use as a homepage instead though like RCT*Mart did. It's extremely hard for forum only sites to grow, RCT*Mart is one of those great exceptions though, but from watching forum-only sites pop up and die shortly afterwards for the past two years in this community, trust me on the one.
-And I think you know what I'm talking about on this one, work on your public relations.