http://www.s3rsync.com/
Rsync to S3 is a service which combines EC2 and S3 to provide a bandwidth efficient S3 based backup mechanism. It takes advantage of the free bandwidth between EC2 and S3 to overcome the limitations of S3 for rsync backup.
http://weoceo.weogeo.com/
WeoCEO is designed to provide a constant front end to Amazon EC2 / S3 services. It provides stable IP, load balancing and DNS management to ensure your app stays online.
http://www.digital-web.com/articles/client_side_load_balancing/
An article describing a system that uses client side load balancing in a Web application. Voxlite is the example application built on Amazon EC2 and S3.
http://www.3tera.com/
3tera provide a grid platform to deploy "virtual appliances" on a "virtual datacentre" built on top of commodity hardware, similar to Amazon's EC2/S3.
