Amazon CloudFront, Amazon’s content delivery network (CDN), has moved out of beta and into full production. At the same time a Service Level Agreement (SLA) has been implemented: if content availability drops below 99.9% in any given month, a credit equal to 10% of the monthly bill can be applied for, and if content availability drops below 99% then a credit equal to 25% of the monthly bill can be applied for.
Additionally CloudFront will support custom origins. In beta, CloudFront would only act as a CDN for data stored on Amazon Simple Storage Service (S3). Now any server, load balancer or even an Amazon EC2 Instance can be nominated as the origin.