Google Adsense now offers the possibility to the user to choose from three corner styles: square corners, slightly rounded corners and very rounded corners. The new option can be found in the “Adsense Setup” tab from the Google Adsense account.

Google has done some improvements lately to improve the look of ads, but the CPC rate is going down and down, unfortunately.

Here’s an example for each type of corner ( click to enlarge ):

via Inside Adsense