Update 1: Shashank Tiwari, blogging for O’Reilly ONJava, has written a very nice summary of the Restlet project, explaining that an object-oriented API such as the Servlet API may not be the best paradigm to deal with the Web. The Restlet API provides a resource-oriented alternative based on the REST style which the natural style for the Web, HTTP and URIs.
Update 2 : Brian Repko is also investigating REST via Restlets and is seriously investigating the problem of domain modelling in REST, how to specify good URI and which methods to use (expressing concerns about the four verbs approach). He is also writing about modeling transactions in REST.
Dion Hinchcliffe, expert and frequent writer on topics such as the Web 2.0, looked at existing REST frameworks suitable for WOA (Web Oriented Architecture) and identified the Restlet project as “the most advanced framework for REST”: A Search for REST Frameworks for Exploring WOA Patterns.
The previous link was provided by Chris Winters who also wrote about his experience with Restlets, leading him to develop the best sample application so far. He also describes the policy used by his company when working with open-source projects: Work + open source: getting the point.
Karthikeyan Panchanathan recently discovered REST and the Restlet project. He points to an interesting interview of Bruce Tate in SearchWebServices.com, an advocate of Ruby on Rails and lightweight REST Web services: REST recommended for Web services coders.
Laurent Bois points to Restlets while underlining the place of REST within the SOA trend, as an alternative to SOAP: SOA: SOAP et REST (in French).