Here is the thread on their forum:
It is making some of my sites look bad as I chose to put all the css and images on S3 so they would be severed up in a distributed fast manner. However, that speed is not being appreciated right now as it is not working.
My task this week will be to design a backup plan or move the css and images.
UPDATE: I have a backup plan now - which is nice. Amazon is also back up after 7 hours of downtime so I have turned off the backup service. One positive thing is that I now have a backup plan that can be turned in within minutes.