Not a good first impression
If I went on a forum for the first time and saw so much stuff on the top, I would automatically be put off by it.
I can understand the advert being there, the notice about IE problems and the welcome notice (which can be made nicer). But whats the point in the big banner advertising Rare Values announcement? Whats the point in the "top secret prize" announcement? No Habbo will register just because of the top secret prize if they don't know what it is.
When someone first goes on the forum, they cant actually see any content at first glance, just adverts and notices.
http://i39.tinypic.com/14jthuf.jpg
Now compare that to CHF:
http://i43.tinypic.com/14n0osj.jpg