When I tried to access Google Adsense. I got the following message :

Google AdSense

The AdSense account interface is temporarily unavailable due to system maintenance. AdSense is expected to be down from approximately 10:00 AM until 2:00 PM Pacific Daylight Time on September 12, 2009. Please note that your earnings will continue to be tracked as normal, and your ad targeting will not be affected during this downtime. We apologize for any inconvenience.