Those of you on fedora can get the latest by adding the kde-redhat repo here: http://kde-redhat.sourceforge.net/ You'll need to temporarily enable fedora-updates-testing and upgrade systemd before upgrading the kde packages (at least on F18), but otherwise it's been stable for me.

No clue what state that's in, but I believe you can get it in ubuntu 12.10 at https://launchpad.net/kubuntu-ppa