I'm planning on being the maintainer. What do I need to do to take over these packages so that the maintainer is no longer considered unresponsive? Some setting for updating the mailing address? Spec update?
If you have a chance to contact Jordan he can assign the packages to you in pkgdb easily. If not, I think the process is to orphan them and then pick them up:
http://fedoraproject.org/wiki/Orphaned_package_that_need_new_maintainers