One of my AdWords accounts got an interesting AdWords class action lawsuit notice today (bolding is mine):
Subject: Google AdWords Class Action Settlement Notice
Google is sending you this notice of a proposed class action settlement that may affect your legal rights as a creator of an AdWords campaign between October 2007 and July 2009. This notice is being sent to you by Court Order so that you may understand your rights and remedies before the Court considers final approval of the proposed settlement on March 11, 2011.
This is not an advertisement or attorney solicitation.
A settlement agreement has been reached by the parties and is pending approval by the Court. Under the proposed settlement, Google will pay a total of $3,500,000 to the settlement class, including attorneys’ fees and costs, for charges accrued by AdWords users who left the “CPC Content bid” input blank upon creating an AdWords campaign, and were charged for content ads appearing on Google’s Content Network.
IMPORTANT. If the settlement is approved, your legal rights may be affected whether or not you act. You should therefore carefully read the documents filed with the Court concerning the settlement, the reimbursement of attorneys’ fees and litigation expenses, and the litigation generally.
Please go to http://www.largocargosettlement.com  for full details on the settlement and further instructions on what to do to submit a claim, opt out of, object to, or otherwise comment upon the proposed settlement.
Please do not reply to this email.
Please note that Google will never ask you for password information or other personal credentials when sending you notices. If you suspect someone is improperly using Google's name or products to obtain your personal information, please report the message as phishing. See http://mail.google.com/support/bin/answer.py?answer=184963 .
This mandatory announcement was sent to certain AdWords users in the U.S. as part of a legal settlement and was authorized by the United States District Court for the Northern District of California.
Google Inc. | 1600 Amphitheatre Parkway | Mountain View, CA 94043
Pretty interesting - obviously 3.5 million isn't going to tank Google's stock or anything, but a court ruling that automatically opting people into the content network  is pretty big news.
Anyone have more information on this? Drop a note in the comments!