Google AdSense announced they have updated their program policies page, but they say, "nearly all of the policies themselves have stayed the same." That is a bit of an overstatement. Besides for Google Officially Disallows Images Near AdSense Ads, which is huge! They now have updated their Competitive Ads and Services paragraph to read:
In order to prevent user confusion, we do not permit Google ads or search boxes to be published on websites that also contain other ads or services formatted to use the same layout and colors as the Google ads or search boxes on that site. Although you may sell ads directly on your site, it is your responsibility to ensure these ads cannot be confused with Google ads.
That means, you can not Dynamically Delivering AdSense & YPN Ads on Rotation, which I do here and hundreds of publishers do.
To be clear, you must make sure the ads you rotate in look different from the Google ads. So the way I have it set up, I need to change the colors of the AdSense ads from the colors of the Yahoo ads.
Not only that, if you have other ads on the site, they can not look anything like Google ads, even if they are not contextual.
JenSense has her analysis of this and what she expects from the publishers.
Folks are not happy, and there is no date as to when these changes need to be put in place (as far as I can tell).