Well I got as far as putting up a public SVN repository for it at http://code.google.com/p/cgi-application-plugin-rest/
but I haven't done anything further with it because I've been looking at some of the newer web frameworks like Sinatra
and thinking of how to adapt them to CGI::Application
I've done some coding but its waiting for my next round of tuits to be something I can show.
I consider the current C::A::P::REST to be a dead end but if you or anyone else would like to run with it you are most welcome.