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:
According to this policy, publishers must notify their users of the use of cookies and/or web beacons to collect data in the ad serving process. This change relates to advertisers' use of innovative products and features like Gadget Ads and other offerings in the future.
If you skim the forum threads at DigitalPoint Forums and WebmasterWorld, you will see some publisher's disappointment in that change.
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.
Forum discussion at DigitalPoint Forums and WebmasterWorld & Google Groups.