http://dotcommogul.net/uncategorized/increase-your-ctr-with-adsense-backgrounds-for-six-lousy-bucks/ It's a feature you can create a visual background for Adsense. Seems so because you're 'altering' the visual presentation of Adsense and causing extra attention to the ads. But if this is not against their TOS, then I'd like to implement let me know, thanks
It's against the TOS. Anytime you are unsure, email adsense and then you will have a written response if there is an issue in the future.
I think its OK. As long as it is potrayed as ads its ok with Google. In any case of doubt, email to adsense for clarification before using it, as said by mjewel.
I did some reading on the web, from what I read... It's ok to do this, use frames/images on Adsense...BUT, do it in quiet, subtle, manner. If it's too loud or graphic-intensive, then that would cause undue attention to the ads themselves...which is against Adsense TOS.
While reviewing your account, we noticed that you are currently displaying Google ads in a manner that is not compliant with our policies. Publishers may not implement Google ads in a manner that disguises the ads in any way, for instance, by formatting neighboring content to look similar to the ads, or by making ads look like games or forum threads. Additionally, publishers may not attempt to associate specific images with the individual ads appearing on their sites. Such an implementation may confuse users who assume that the image is directly related to the advertiser's offerings. Please make any necessary changes to your web pages in the next 3 business days. We also suggest that you take the time to review our program policies (https://www.google.com/adsense/policies) to ensure that all of your other pages are in compliance. Once you update your site, we will automatically detect the changes and ad serving will not be affected. If you choose not to make the changes to your account within the next three days, your account will remain active but you will no longer be able to display ads on the site. Please note, however, that we may disable your account if further violations are found in the future. Thank you for your cooperation. Sincerely, The Google AdSense Team