I've been adding them into the new skin I'm working on at the moment for Sizael. Ideally I wanted them to hover at the top over the header area, but it was causing a conflict in the coding so I instead opted to use the advert template for above the sidebar and coded them into that, using the secondaryContent div class to wrap round it. (Can't give a full page view at the moment because the new look is a surprise for the members.)
Here, take a peek