Although a bunch of security experts should not care much about the layout of a legendary forum like this one.
However since it has your attention - Honestly a little tweaking can make it superb.
Forum needs to go wider. That's all, it's like captivated between the left side and the right side.
Fo eg. http://www.backtrack-linux.org/forums/
I understand you need some space for the "Right Advertisement" but it shouldn't spoil the entire show right?
It can be at the top as well at the bottom.
Just my 0 valued Madagascar cents