Sick and tired of that GAP ad?
If you look at the HTML, you'll see this as part of the gap's ad:
Maybe CC them?
At the bottom of this page, you'll find a link to "Tell us what you think". Rather than go create your own, cull through all the ones out there and add a comment to them and click on the thumbs up. Keep going back through time and add your $.02 worth to a bunch of these complaints - and there are a bunch out there.
Make it very clear to the GAP that their intrusive ad has made you less willing to shop at their store. Encourage them to go out to Yahoo!Answers and look at all the "questions" that complain about their ad, as well as all the "suggestions" (i.e. Tell us what you think) begging Yahoo to pull this ad.
Make your voice heard. I told them in my complaint e-mail that they should replace their ad with an ad that is an appology!
If you e-mail their adveriting people, the people who made this ad, then you get feedback to the people who can make a difference.