Check out Amazon's Elastic Beanstalk - it handles the provisioning/deployment side of things - setup your environment with "eb start", update your app with just a "git aws.push".
Quite configurable via scripts too (install additional packages, etc). Under the hood it's basically the same - Elastic Load Balancer and EC2 instances.
I gave AEB a try with django about 3 months ago and let me say it was a major headache. Some times it would work other times the load balancer would fail other times it would just laugh in your face( there were many more but you get the point). I wasted weeks trying to get our app running, when it came down to only 3days before our demo run I made some bash and fabric scripts and all was running on multiple instances in about 1hr. Took a snapshot of our state and used that Ami for auto scaling. I myself won't be trying AEB again anytime soon.
Quite configurable via scripts too (install additional packages, etc). Under the hood it's basically the same - Elastic Load Balancer and EC2 instances.