Here is one that may fit:

As a _ I need to bootstrap a singleton or multi-role cluster    
- and deploy with Akka MicroKernel for quick IT testing cycles locally  
- with a servlet listener to deploy to tomcat in S3 to various dev/beta/prod etc environments

without hard-coding in config files but rather via env vars pushed by chef to vms in the cloud. Dynamic env variables that the app doesn't have until load-time begins is the use case I refer to vs static pre-defined in config files. Sorry I should have been clearer.

I've written code for this already and could put up a pr to look at this week if there is interest.