Customize AdSense for your site

Source: http://www.google.com/services/adsense_tour/
You can customize the appearance of ads, choosing from a wide range of colors and templates. Ditto with your search results page. Your reports are customizable, too. Flexible reporting tools let you group your pages in any way you want so you can view your results by URL, domain, ad type, category and more to learn where your earnings are coming from.