Amazon CloudFront looks like a great way of
doing a Content Delivery Network (CDN) on the cheap. I don’t see a way for me
to use it right away but it’s certainly a great way to make static content
quickly accessible.

You put your files on Amazon S3 (Simple Storage Service) and use the CloudFront api to create a url to access those files. Amazon takes care of caching the content close to the user and ensuring it’s scalable.