Very cool, Joe! The JVM and hot-upgrade Erlang stuff looks especially nice.
Any reason this can't just turn into a pull request for Opscode's application cookbook though?
IIRC the Boundary app cookbook is a pretty big divergence from the Opscode application cookbook due to their reliance on roles, environments and etc. Additionally our cookbook has a far more narrow (I think in a good way) focus. Both have their place, just probably not in the same cookbook.