Just a little review:
Likes:
-I like it how there is a consistency between colours. People will tend to remember your forum by the skin, or scheme, and yours is purple and black, so when people here purple and black, they will remember your forum.
-Its a forum, and thats what is being displayed first. Thats good as most of the time, portals really distract people, defy the purpose of a forum.
-I could easily located the register button. Most of the time, the register button is crammed at the top, on one side, in normal font, so its barely visible. Yours is quite clear and simple to the eye.
-Ads are at the bottom, which is a plus. Its not a distraction, nor does it take up too much space.
Dislikes:
-There is nothing unique about it. I know its new, but tell me, why would someone want to join?
-I think you have just a little too many forums. Try to group those which are related. Its easier for new members to locate, and easy for you to navigate. Having a lot of forums, where most of them have little amounts of posts, will make it look inactive, and visitors won't like that.
-The banner is a little bland. Nothing much going in there.You could incorporate an image of a chart showing "gowth", and something for people to admire.
-The administrator's colour is uniform to the rest, so you won't be able to stand out from the rest. People will regard you as a normal member, which is good most of the time, but not good when showing authority etc. (but not a major thing)
-I noticed when I opened two forums up, yours took a considerably longer time. To be honest, the other forum looks as if it has more features, so that should have taken longer, but yours did. Just have a little check on your host.
Hope that helps a bit. Good luck with your forum.