CyanogenMod has just released its latest "M" build, CM10.1-m2 based on Android 4.2.2, for several different devices. The M builds are meant to be a bigger step up in stability from just another nightly build, but not quite ready for the mainstream as a "stable" release. Its for this reason that the CM team encourages bug reports on these builds, which can go a long way towards that stable release. Starting today the CM10.1-m2 builds will be available for several devices, including the Nexus lineup, HTC One X / Evo 4G LTE, Galaxy S / S2 / S3 / Note and a few other odds and ends.
If you're interested in moving up to the latest M build and have one of the above devices, head to the source link below and grab your download. If you don't see your device listed just yet, don't worry. They note that CM10.1 nightly builds will continue for other devices until they hit a level deemed acceptable as an M build.