Deploying Rails Apps to EC2 with Capistrano

I've created yet another system for deploying rails apps to ec2 using capistrano.  None of the others were doing it for me, primarily because I needed a way to deploy/configure/scale-up to multiple instances as needed.
  What makes this system different?

• Role and/or host based configuration of instances


• All configuration for your instances lives in your project's source tree and gets applied on deploy


• Configuration system handles dynamically adding instances


• Configuration templates for sharing deployment scenarios


• Start with a single instance and scale up as needed without editing config


• Use whatever AMIs you want (so long as they are debian based :)

You can find the README file in subversion on rubyforge (project rubber).  You can install the framework from subversion as a rails plugin in the usual way - the README walks you through a demo using the plugin on a dummy rails app, and there is no need to check anything into subversion to do the demo.

This is still very much a work in progress, so don't use it in production, and expect things to drastically change requiring you to reinstall and reconfigure.

Any feedback appreciated, but check the TODO first :)