ota is now live. Direct link from google here
http://android.clients.google.com/p....signed-yakju-JZO54K-from-JRO03C.24a9a760.zip
how to flash here [REF] [HOW-TO] [GSM & CDMA] Official Google OTA update URLs -- Latest: JZO54K / 4.1.2 - xda-developers
must be yakju device on build JRO03C
http://android.clients.google.com/p....signed-yakju-JZO54K-from-JRO03C.24a9a760.zip
how to flash here [REF] [HOW-TO] [GSM & CDMA] Official Google OTA update URLs -- Latest: JZO54K / 4.1.2 - xda-developers
must be yakju device on build JRO03C