Damian and I find ourselves not having enough time to maintain RT::Client::REST . Now that RT 3.8 is out, there are a number of incompatibilities that crept up and people have been submitting patches , but there’s no one to apply them. We would be glad to offer commit access on Google code  and co-ownership on CPAN to anyone willing to continue developing and maintaining the library.
RT::Client::REST has been successfully used by many people for over two years and I’d hate to see it get obsoleted just because I don’t use it. I think the community of RT developers benefits from having a working, stable, and compatible client library.