Ad non Sense. Net

AdSense has launched a new beta test called Vertical Images, where an image would take the place of an ad within an AdSense ad unit. These images - which are generic, and not company-specific - act similar to an ad link unit, linking to a page related to the ads and image that appeared in the ad unit.

Publishers are allowed to click the images themselves (just be careful not to accidentily click the ad below it!) but you cannot click on any of the ads that appear on the results page, just as how publishers can click on ad links keywords but not on any of the results. New AdSense “Vertical Images” within ad units - JenSense.com