On Saturday, July 12th, 2008 the AdWords system will be unavailable from approximately 10 a.m. to 2 p.m. PDT, for maintenance. While you won't be able to sign in to your accounts during this time, your campaigns will continue to run as usual.
AdWords system maintenance typically occurs on the second Saturday of each month during the above times.
We'll continue to update you via the blog as we always have, but please make note of the July 12th date and our scheduled maintenance further down the road.