Wordpress does this, but rather than serve the images from s3, it uses s3 to store the images and populate a self-hosted varnish cache: http://blog.apokalyptik.

Wordpress does this, but rather than serve the images from s3, it uses s3 to store the images and populate a self-hosted varnish cache: http://blog.apokalyptik.com/2007/10/10/so-you-wanna-see-an-image/ http://blog.apokalyptik.com/2007/10/10/so-you-wanna-see-an-i... This reduces the s3 bill by an order of magnitude (http://ma.tt/2007/10/s3-news/ http://ma.tt/2007/10/s3-news/), so you may want to consider this approach. In fact, using this approach, you could use s3 (just storage) to undercut s3 (storage+bandwidth) on cost and get lots of customers! I'd be in! :-)