Building more effective Banner Ads that convert

This is a fantastic read about how building interactive banner ads can help improve CTRs in paid advertising significantly. Google itself is doing a wonderful job. If you have seen there recent banner ad on many adsense sites that says"Which button will get more clicks' you will see what I am talking about. We always need to be figuring out ways to allow our clients to convert better!
http://www.google.com/adwords/watchthis ... index.html
http://www.google.com/adwords/watchthis ... index.html