Rocael,
I have no plans to put the XML-RPC server in the OpenACS CVS repository. I've switched over to GNU Arch (http://www.gnuarch.org) for all my development. Not only is it technically superior to CVS, I also belief that the distributed model fits a project like OpenACS better.
A public copy of my XML-RPC archive is accessible from the Code Mill, see http://www.thecodemill.biz/services/xml-rpc/ for details. In addition, the XML-RPC client will always be available in APM format too. The XML-RPC server is available as a tarball (as it is not an OpenACS package).
/Bart