I started the REST Security project on GitHub to explore writing an elegant REST Services with the latest and greatest Spring had to offer. That was Spring 3.1 and now Spring 3.2, moving towards Spring 4.0 and 4.1.
Since then, the rest-security project has grown in complexity so I am now updating and migrating the tutorials to a simpler and more focused tutorials GitHub project.
Core Spring Tutorials
Further Topics to Explore
1. A request limitation mechanism for REST
2. Richer link semantics in REST and an ATOM based REST representation
In the meantime, you can check out the full implementation on Github.