There has been updates to the Google AdSense TOS. This is important to LinkWorth publishers who use AdSense as a source of additional revenue. We posted before about how our ads do not violate their terms as long as you do not format them to mimic AdSense ads. It is still the same thing, just make sure your users can differentiate between AdSense ads and LinkWorth ads. If you have any question or doubt, don’t chance it, make them look different.
Here is a good article I read with more detail. You can move on to the JenSense blog to read further if you are interested.
Publishers have often complained about the rigidness of the AdSense policy that prevents publishers from running AdSense on the same page as another contextual ad program. So running AdSense & Yahoo Publisher Network on the same page during the same page view would be a no-no, but rotated 50/50 would be perfectly within the AdSense (& YPN) policies and terms. But not any more. Their competitive ad policy has gotten much, much tighter when they updated their AdSense policies today.
Their competitve ads & services policy was updated to this today:
Competitive Ads and Services 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.