Found a cool AWS Web Site, reporting Service Health.
Amazon guys are thinking of customer support.
Amazon Web Services publishes our most up-to-the-minute information on service availability in the table below. Check back here any time to get current status information, or subscribe to an RSS feed to be notified of interruptions to each individual service. If you are experiencing a real-time, operational issue with one of our services that is not described below, please inform us by clicking on the "Report an Issue" link to submit a service issue report.
Jun 4, 2008
Amazon Elastic Compute Cloud (Instances)
[RESOLVED] Severe Weather - Instances Unavailable
12:29 PM PDT We are currently experiencing severe weather near one of our Amazon Web Services locations. We are investigating impact and will provide updates on the dashboard.
1:01 PM PDT During the transition to backup generator power, we had a small number of EC2 instances in a single Availability Zone shut themselves down. We will be restoring these instances and will post here when this is complete. We continue to monitor the situation closely.
2:26 PM PDT A brief update to let you know that all instances affected by this issue have been restored. We'll also be following up with additional information about this event.
Amazon Simple Storage Service (US)
[RESOLVED] Severe Weather - timeouts and 503s
1:52 PM PDT Amazon S3 US customers may currently be experiencing an elevated rate of timeouts and 503 errors due to the severe weather events near one of our locations. We are investigating.
1:56 PM PDT Quick update to let you know that we are currently in the process of recovering.
2:14 PM PDT Recovery is proceeding, though some customers may still be seeing timeouts and/or errors at this stage. We'll post another update shortly.
2:35 PM PDT Amazon S3 US has recovered and system-wide performance has returned to normal. We'll be posting here with more information about this event once we've completed our investigation.
and, here is an example of an incident report.