Nexus 7 owners are already starting out to receive the Android 4.2 upgrade in the air. Your tablet will automatically check for it every so often, but if you want to hurry it along you can go to Settings -> About tablet -> System updates, and tell it to check again.you might want to additionally download it from google and manually install it using Liam Spradlin's instructions, though this can be not recommended unless youre an experienced android hacker and are by using the wi-fi version as to the nexus 7.
Galaxy Nexus owners who bought their phones given by a wireless carrier have had to actually wait an unusually long time for upgrades, as long as many months from a new android versions announced. If you bought your Galaxy Nexus phone from a wireless carrier, an upgrade probably won't be available anytime soon. People who purchased their Galaxy Nexus from the Google Play store are reporting that they are getting the upgrade, though, and Spradlin again has instructions for how to install manually if you are using a Galaxy Nexus bought from the Google Play store.
