Cyanogen Mod 10.1 is finally official in the form of nightly builds thanks to Invisiblek. Check out the Install method in the video above. I will be putting together a more formal review of the Rom for this device later. It should be noted that CM is an AOSP rom and you will lose all Touchwiz functionality if you flash this.
You should be rooted with recovery installed before you will be able to install this.
