Nexus 7 owners, it's your turn. Earlier this evening, before many countries even had access to Nexus 4 or 10 orders, Google began pushing the 4.2 (JOP40C) update to the Takju Galaxy Nexus. After some patient waiting, it appears the Nexus 7 is now ready for an update as well. In case you don't feel like waiting on the OTA though, we've got the download link and some super-easy instructions for manually updating your favorite 7-inch slate.
Prerequisite: Your Nexus 7 should be running Android 4.1.2 build JZO54K. You will not lose your data using this method.