What is actually the difference between Adwords and Doubleclick? (http://www.google.com/doubleclick/ They both seem to be Google product/brand. I searched Wiki and Doubleclick pages, but couldn't really understand what kind of ad network is it (is it network at all? is it some engine Adwords use?) Can someone explain me what Doubleclick is? (And "Rich media gallery" http://www.richmediagallery.com/ ?) Thanks
I don't see a way to opt-in for Double-click, but It looks like something they've put lots of work into, so Im guessing It is something yet to be announced.