A new update for Asus' middle-range Android tablet is rolling out at this very moment. Users on XDA are reporting getting the update notification, but it appears to be a little fickle with rooted devices. The abbreviated changelog claims this is a simple stability enhancement.
To get the software on a rooted device, it is recommended that you take a few steps before applying the update. First, unfreeze all your system apps, backup your root (with OTA RootKeeper), reboot, then apply your update. Root access should not be broken, but you have your backup just in case. Stock devices should have no issue installing the update.