What I'd really like is a collection of Chef recipes to replicate a Heroku-like environment, complete with git deployment, buildpack compatibility, logging, etc.
If you're looking for a Heroku-like environment with buildpack compatibility, you should check out OpDemand: http://opdemand.com/
The application stacks are basically a collection of open-source Puppet modules that replicate a Heroku-like environment on EC2, compatible with most Cedar buildpacks (Node, Ruby, Python, Java, Clojure). Real-time logging is piped through the web console. Workflow is to push code to your GitHub repo, press deploy and your code is pulled onto the instances, Puppet policies applied, etc. Command line `opdemand deploy` is available too.
It's also more than just app stacks, you can also deploy/integrate your own custom EC2 "addons" alongside your app stacks and manage them all as a unit (Redis, Mongo, PostgreSQL, custom services, whatever). There's also native support for Heroku apps via the web console which makes it easy to migrate to/from Heroku and EC2.
