State machines are awesome but sometimes you need a little more. Like who should do what in order for it to move on? How many steps are left? How can I restfully trigger the next event? Self Control adds route helpers, controller actions and a dsl to turn your existing state machines into full workflows. It is designed to use rails 3 with ActiveModel and should work with any state machine with just a few extra methods.
Gemfile gem 'self-control', '~> 0.2.2'
install gem install self-control