i found adclustr.com a few days ago it offers a whole lot of adsense backgrounds and images for integrating adsense ads with your webpage design and colour scheme. www.adclustr.com guys at google say it's LEGAL to use these images with adsense. the images actually create the illusion of a background. in reality the images are only around the ad units, but are designed to blend with the adsense colours of your site. check out the ad bg used in my site: www.virtualgarage.co.nr