[auntjemima]

AWS is a separate wing from the Amazon site, they buy their own servers and datacenters. There have already been numerous S3 and EC2 outages.

You won't get any support at AWS unless you pay for a premium contract. And, unlike SimpleCDN, there is no SLA with CloudFront yet.

While everyone has indeed heard of AWS, they are not in the same category yet with Akamai and Limelight just because they released a CDN product.

In each case, for the sake of a discount solution, you are probably sacrificing reliability, bulletproof contracts/SLAs, and a TON of presence locations vs. something like Akamai.

I like my brands just as much as anyone, but I think you're taking just as much chances with SimpleCDN vs. CloudFront. And with SimpleCDN you get better prices and an SLA that offers refunds for outages (which is better than nothing).