Greg Sterling has been on a roll! Tonite he puts out the early word that Google is launching "click to play" video ads in AdSense. I don't see that on JenSense yet (though Quigo has a new ad format) - (update: now she does), nor does the AdSense blog have anything about it.
Ah, Google announces it on the Google AdWords blog - as part of the content network. I guess the AdWords blog is where they notify advertisers of new stuff. The AdSense blog is for publishers perhaps?
It's a bit annoying that the screenshot is blocked by that annoying Flash dialog asking you if you want to allow Flash to store info locally (at least for me, with my paranoid Firefox security settings). C'mon, can't we get rid of that thing and make the default "no".
Anyways, Greg's insight here - the influence of the reach of the AdSense network is gonna make this an interesting experiment.