I read a fascinating thread (on the Bangalore RUG) there's a application builder for Rails
called Hobo. "...It generates views by inspecting models using DRYML templating language. It's available as gem( name: hobo ). It has is the concept of lifecycle of a model, where you 
define the states of a model. It transcends from one state to
another, and what actions are to be taken when a models state changes.
Hobo comes with a permission system and the way of defining models. You
declare all the fields in app/models/something.rb and it automatically
generates migrations for you." Comments?