What a coincidence. Well, maybe not. Advertisers advertise their ads with Adwords which are essentially what shows up in Adsense. So if their’s a system maintenance done with one, the other *might* be affected anyway.

I’m not leaving this to chance and here are the notification pages that Google has setup when you try to login into both Adwords and Adsense.

Adwords: http://www.google.com/errors/awfe/system_down.html
Adsense: http://www.google.com/errors/asfe/system_down.html