And I think for them putting different languages on the warning is meaning that it is down all over the place!
Nope! They have a default URL --> http://www.google.com/errors/asfe/system_down.html Visit that link even when the site is up and running, you will see the same message. So, they just redirect http://www.google.com/adsense to http://www.google.com/errors/asfe/system_down.html
Just like maintenance on your site google does that to. Just give it a few hours and it should be all better.
Excellent way to describe.... yeah its down in India we are already having a thread here http://forums.digitalpoint.com/showthread.php?p=8797432