Google Adsense and Google Adwords are temporarily down due to routine maintenance from 10:00 AM to 2:00 PM Pacific Daylight Time today i.e. on 10 April, 2010. I just opened my adsense account and I got this message from Google

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 April 10, 2010. 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.

I closed the window and tried to open Google Adwords and got the below message

Google AdWords
The AdWords account interface is temporarily unavailable due to system maintenance. AdWords is expected to be down from approximately 10:00 AM until 2:00 PM PDT on April 10, 2010. Please note that your campaigns will be running normally during this short period of downtime, which only affects your account management pages. We apologise for any inconvenience.

The Google Team is doing the routine maintenance for its 2 of the major services. Not sure if all of the Big G’s services would be down or just these two. But its good that we are getting a message from them that their servers will remain down for some period of time and if we want to do some important works then we must do it prior to the closing time.