Amazon Web Services went down

Amazon Web Services that provide web-scale computing infrastructure to many other companies were down over 30 minutes yesterday morning. A number of websites that depend on Amazon's S3 storage, and EC2 compute cloud were affected. Eric Schonfeld(TechCrunch) comments on the reliability of cloud computing business:
"Nobody is going to trust their business to cloud computing unless it is more reliable than the data-center computing that is the current norm. So many Websites now rely on Amazon’s S3 storage service and, increasingly, on its EC2 compute cloud as well, that an outage takes down a lot of sites, or at least takes down some of their functionality. Cloud computing needs to be 99.999 percent reliable if Amazon and others want it to become more widely adopted."
This raises an issue related with usage of storage services like S3, one should never build architecture that requires high availability access of such a service. Further, it's a warning signal to such storage service providers to incorporate architecture with no single point of failure.