It is working for me. I had a friend complaining about getting into hotmail, and his MSN Messenger name sent me a phishing message the day before. So I think there may be some nasty things going around.

As of today AdCenter is fine here in Chicago.

Hi All,

If you are still experiencing issues with this error, please contact support to have this investigated right away. Here is the contact information.

United States:
Telephone: (800) 518-5689 6:00am-18:00pm PST seven days a week
Easy Assist Remote Desktop Assistance: (866) 783-1045
Email: [support.adcenter.msn.com...]

United Kingdom:
Telephone: 0800 633 5915 08:00 – 18:00 (UK) Monday – Sunday
Email: [support.adcenter.msn.com...]

Canada Support:
Telephone: (800) 985-4671 6:00am-18:00pm PST seven days a week
Email: [support.adcenter.msn.com...]

Singapore Support:
Telephone: (800) 518-5689 9:00 am – 11:00 am SST Monday through Friday
Email: [support.adcenter.msn.com...]

Thank you

Brian H - MSFT