Sorry to revive an old thread.

You may find some more info on this subject at

http://www.youtube.com/user/BTI360#p/a/u/1/xLWm8PJjdBk - RESTful Web Services with Spring Part 1 of 3
but more importantly

http://www.youtube.com/watch?v=TNE7NBLseRA RESTful Web Services with Spring Roo