A week ago, the "takju" (Google Play Store) version of the Samsung Galaxy Nexus started receiving the Android 4.2 OTA rollout. Of course, this left users of other variants of the device moping sadly in a corner. As of late yesterday these folks now have a reason to be happy again. The "yakju" version of the Samsung Galaxy Nexus has begun receiving the OTA rollout as well. This is the latest version of Jelly Bean (build JOP40C) for the device.
Additionally, Google has made this latest version available for download on the Google developer site. Here's a link if you want to grab the update manually. Otherwise, just give it a couple of days and you should see yours soon.