Samsung has started rolling out Android 4.1.1 Jelly Bean to WiFi variants of Galaxy Tab 2 7.0 And Tab 2 1.0 in US and Canada. Earlier, months ago Samsung rolled out same update in Europe but now its turn for US and Canada. You guys can update your tablets via OTA and Kies.
After update you will get all Android 4.1.1 jelly Bean luxuries on your tablets like: Google Now, Project Butter, improved performance, enhanced notifications, and more.
The update weighs around 311 MB. You can manually check by going to Settings > About device > Software update.
Via Android Police