Ah, you're still on Jaunty. It's unselectable because PulseAudio isn't running. Did you install it ? It doesn't come with the base installation for Kubuntu (however if you see the blank devices you probably had it once)
Once installed and KDE restarted Phonon will spawn PulseAudio and the blank devices should be selectable.
If you're on Jaunty forget what I said about the "PulseAudio" item, use the blank devices instead.
Ah, you're still on Jaunty. It's unselectable because PulseAudio isn't running. Did you install it ? It doesn't come with the base installation for Kubuntu (however if you see the blank devices you probably had it once)
Once installed and KDE restarted Phonon will spawn PulseAudio and the blank devices should be selectable.
If you're on Jaunty forget what I said about the "PulseAudio" item, use the blank devices instead.