CRUD through HTTP is a good step forward to using resources and becoming RESTful. Another step further into it is to make use of hypermedia-based services and the Restfulie gem allows you to do it very quickly.
Information regarding Project Releases and Project Resources. Note that the information here is a quote from Freecode.com page, and the downloads themselves may not be hosted on OSDN.
A transition creation API is supported. The API was changed to use the acts_as_restfulue block instead of defining following_transitions. Support for the render_resource method was implemented. Automatic support was added for eTag on the client side and for eTag and lastModified on the server side. eTag on the client and server side was documented. render_resource was documented. JSON is working on the client and server sides. The transition DSL was documented.
