Use yUML to generate Rails diagrams using RailRoad and Shoes
This is a simple plugin that adds Rake tasks to display model diagrams for RoR apps.
It uses an extended RailRoad to output yUML diagrams which are drawn using the service at yUML
There's also a small Shoes app to display the downloaded diagram.
Feel free to do whatever you want with the code but please share your results with us.