CyanogenMod 10.1 official nightly builds are now available for the GSM version and the Sprint variant of the HTC One. The builds aren't yet considered stable but are working sufficiently well for enthusiasts to use. The biggest bug at the moment seems to be that the audio on outgoing calls can be "hit or miss".
Just out the door, T-Mobile Galaxy S4 already running unofficial CyanogenMod build
Koushik Dutta's new superuser access app, ClockworkMod Superuser, has been fully integrated into CyanogenMod. The open source app supports multiple user accounts on Android 4.2 devices, PIN protection and integration into the Android notification system.
Android 4.2.2-based CyanogenMod 10.1 M2 builds now available for two dozen devices