Google AdSense Referral System
http://blog.galaxywd.com/articles/4581/1/Google-AdSense-Referral-System/Page1.html
By David O Connell
Published on 06/29/2008
Recently, Google has declared a referral system called Google AdSense Referral System as its intended ad delivery system Even though this news was declared in January 2008, some folks are not aware of the changes made by Google