[ryannielson]

I wrote a gem that I've used to help with the secret key problem in the past. It's called Envious: https://github.com/RyanNielson/envious

Basically it adds a yml file, that is added to .gitignore, with configuration settings that get added to ENV. It can even send your environment variables to Heroku using a Rake task. There are some examples on the page. You can use it to have different secret keys depending on your Rails environment as well.