Google has announced and given some examples of their new Flash based ads. They seem to vary from average size to full screen-width Flash advertisements, with some interactive abilities. 'Gadget ads can incorporate real-time data feeds, images, video and much more in a single creative unit and can be developed using Flash, HTML or a combination of both. Designed to act more like content than a typical ad, they run on the Google(TM) content network, competing alongside text, image and video ads for placement. They support both cost-per-click and
cost-per-impression pricing models, and offer a variety of contextual, site, geographic and demographic targeting options to ensure the ads reach relevant users with precision and scale.

http://www.google.com/adwords/gadgetads/success.html