On: Why Netflix Chose Amazon’s Cloud as Their Computing Platform

Agreed, I was interested to see which of Amazon's features were particularly of use to them. As opposed to, say, Rackspace Cloud.

This talk by @adrianco may address the points you were looking for - http://www.blip.tv/file/4252897

To sum up, Netflix's strategy is to go with the best and biggest in each category, and AWS is obviously the biggest as of now.

If anyone is interested slides from that talk are here: http://www.slideshare.net/adrianco/netflix-on-cloud-combined...