CyanogenMod 10.1 is keep bringing Android 4.2 to more devices each day, and Samsung fans will be glad to know that nightly builds are now available for the Galaxy S and Galaxy S III (AT&T and T-Mobile varieties).
If you want to download the builds for your device, you can do so by heading over to the CyanogenMod downloads site. Specific links for each device are available from the sources below.