A minor gripe with the Interesting Tags display and advertising, specifically on Stack Overflow but probably more generally applicable - sometimes there is a good-sized panel ad in the top right panel, above the interesting tags list, and sometimes there isn't (when not, it might be below the list). This is when I'm logged in, so it isn't the anonymous/repped user ad level discrepancy.
The result of this is that the Interesting Tags is not in the same location at all times, so grabbing one of my tags is a bit awkward (I have to hunt for the tag list).
OTOH, I understand that the top of the right sidebar is prime ad space.
If the wizards who work on the SO software could somehow invent a solution that keeps the tags in a consistent place without sacrificing advertising needs, I think the resulting UI would be easier to use. Any great suggestions for how this can be done?