Nightly builds to begin rolling out "relatively soon" for both GSM and Sprint models of the One
With both a post on its official Google+ page and new thread in the HTC One forums at XDA, CyanogenMod has announced that CM10.1 nightlies are beginning to roll out for all models of the HTC One. Whether you have a GSM model or one running on Sprint, you can expect the first builds to show up on the get.cm site "relatively soon". These things take time, so while you're waiting you can follow the instructions from the forum post to make sure your device is ready. If you're running a GSM model you'll of course have to unlock the device via HTCDev, as well as have all of the downloads ready to flash a custom recovery and push all of the files over.
We're sure there are a whole lot of you that are ready to get cracking on some custom ROMs for your own HTC One, but following the right process will always help you in the long run. If you're unsure, you can always consult the forums and ask some questions before you dive in.