Google has made changes to the Google AdSense Terms and Conditions policy last night. The Inside AdSense blog said the changes were to include "future products and feature," such as Gadget Ads and an update to the "privacy requirements."
The major concern with AdSense publishers is this line:
In my opinion, nothing will happen. Most publishers will agree but not read the new terms and conditions. Google will likely not enforce the new policies and everyone wil end up happy.