Lenovo might not be the most prodigious maker of Android tablets around, but it's got its followers. Those who bought the 9.7-inch IdeaTab A2109 model, check your Tablet Settings: users on Lenovo's official forums are reporting that their hardware is being updated to Android 4.1.1 (A2109A_A411_03_13_121126_US) today. So far only American users have confirmed the over-the-air download or the WiFi tablet.
If you're not getting your update, there's a flashable US ZIP hosted on Lenovo's servers, ripe for the taking. While China's favorite PC manufacturer tends to leave their hands off of the core of Android, they also bundle in a whole lot of extra apps, which is why you'll need nearly 400MB of free space for the Jelly Bean upgrade. If you've done any custom work on your hardware, you'll also loose root. Have fun, kids!