A WebmasterWorld member informs the community that he accidentally fell prey to a phishing email that he assumed was coming from the Google AdWords team.
While nobody else has been impacted by the email at this point, it's important to be advised that there can be such issues in the future. In the event that you accidentally succumb to the psychological powers of such an email, change your password immediately. Keep the email intact with full headers and forward to Google so that they can investigate.
Forum discussion continues at WebmasterWorld.