You actually don't need flash to run our demo, the ads are already appearing on that page (provided you have javascript enabled). The flash demo is only to help walk you through what triggers the ad appearing and disappearing. We tried to make the ads as pleasing as possible and ridiculously easy to get rid of (hit the X, shake your mouse, or hit the escape key on your keyboard). I'd be interested in seeing what you think of them. Example: http://www.phonemyphone.com.
1. Whatever network you're serving the image ads from is already in my blacklist, so I just get the loading indicator. The indicator animation is irritating.
2. Get rid of the fade-out animations. Just have it disappear.
3. Any event that fires on mouse movement is evil. Re-position the ad on page-up/page-down instead.
These are great feature ideas I will add to Trac for new releases.