Following on from the Takju version of the Android 4.2 update for the Samsung Galaxy Nexus it looks as though the same could be coming out for the Yakju variation.
Samsung Galaxy Nexus Android 4.2 Jelly Bean update (Yakju)
The build is JOP40C for anyone that doesn’t want to wait for the real deal and it is available for download and flashing now.
Be aware that the update is only for the Samsung Galaxy Nexus Yakju, which is the international version which can be purchased from the Play Store. Therefore you will have to have the build JZO54K if you want to download and install this update.
If you want to update your Samsung Galaxy Nexus device manually then the process to do so is relatively simple. If you are using a custom recovery then it is as simple as downloading the zip and putting it onto the device and then flashing. Therefore if you have got the stock recovery you can get the download and follow the steps at the source. Good luck!