Android 4.0 Ice Cream Sandwich based CyanogenMod 9 (CM9) is now a "stable" release for Android smartphones. CyanogenMod team has announced that "this will be the end of the line for the ICS branch" and that they will only fix critical bugs from now on. The team will focus only on CyanogenMod 10 (based on Android 4.1.1 Jelly Bean) and maintaining the CyanogenMod 7 (based on Android 2.3 Gingerbread) codebase.
http://www.cyanogenmod.com/blog/cyanogenmod-9-stable