If we did what salathe suggested we would have to change the design of the entire header...the navigation would be in a different position on the main page than on the forum navigation. Considering we aren't having banner adverts on the index page this would not work.
I am open to all opinions on the design of the advert rotator, but we are happy with it and as far as i can see the majority of members like it, we have no plans to change it