I'm new to this, so I'm no expert, but I noticed a couple of things that might help. You have a couple of items that are listed that are empty (events, polls, classifieds, etc...) I would eliminate those from your homepage until those begin getting used, or go in and make some entries yourself. 2nd thing I noticed is that when you first go to your site, you basically only see the header and the menu links. You have to scroll down to see a lot of the components. I would cut your header size in see more half, minimize the height or, add the scrolling information bar you have that explains your site, into the header. Lastly, I like how you intergrated phpbb, but you have no forum posts. Also, your forum rules kind of scared me a little. It also says that if there aren't forum posts for your topic, then you can't discuss that subject. But there aren't any posts yet, so if I was a user, I would assume that I'm not allowed to post. I could be wrong, and you might have hidden posts to non members, but that's what it looks like to an unregistered person.
Just my 2 cents.