Here's a list of commercial CDN's: http://www.web-caching.com/cdns.html http://www.web-caching.com/cdns.html and, academic: http://en.wikipedia.org/wiki/Conten

Here's a list of commercial CDN's: http://www.web-caching.com/cdns.html http://www.web-caching.com/cdns.html and, academic: http://en.wikipedia.org/wiki/Content_Delivery_Network#Academic_CDNs http://en.wikipedia.org/wiki/Content_Delivery_Network#Academ... And, S3 is storage, not a CDN.