SmugMug does not use "Elastic Block Storage," which failed during the recent outage. SmugMug also does not rely completely on cloud computing. "The exact types of data that would have potentially been disabled by the EBS meltdown don’t actually live at AWS at all; it all still lives in our own datacenters," says company CEO Don MacAskill.
The advice is obvious. When using cloud computing facilities, an organization requires the same level of redundancy as when using facilities on the premises, or in an owned data center.