You have a great logo and portal page so far. For being a site that is still in development it is a very clean and well done look.
The welcome message is generic and offers little to tell what the site is about. Your Introduction message below does a much better job. I would suggest combining the two, into one area and saving the space for other uses.
The forum, like the rest of the site, has a very clean and simple look. The forum icons seem almost too simple when compared against the logo. Still, it keeps the simple theme and makes for a very clean forum.
My only suggestion would be to consider a wide version of the skin, so people can choose the look they want.
Great job so far