Amazon has launched a new web service for content delivery called “CloudFront” that integrates seamlessly with Amazon S3 to provide low-latency distribution of content with high data transfer speeds through a world-wide network of edge locations. It requires no upfront commitments and is a pay-as-you-go service in the same style as the other Amazon Web Services.
Amazon CloudFront has been designed to be fast; the service will cache copies of the content in edge locations close to the end-user's location, significantly lowering the access latency to the content. High sustainable data transfer rates can be achieved with the service especially when distributing larger objects.
Pricing in the U.S. and Europe starts at $.17/GB transferred, ranging down to $.09/GB for transfers over 150 TB/month. They’re somewhat higher in Asia.