This week's book giveaway is in the OCMJEA forum. We're giving away four copies of OCM Java EE 6 Enterprise Architect Exam Guide and have Paul Allen & Joseph Bambara on-line! See this thread for details.
JAX-RS is just a spec and Jersey is Sun's... oops Oracle's reference implementation for the JSR. Restlets have been around for a long time even before the JSR was drafted. It is the most mature framework with an extensive feature list. You can find all about it at
Restlet Feature List
There are many a factors to be considered while choosing a restful framework or as such any framework viz