Google is yet to start shipping their self-branded Nexus 7 Tablet to regular customers but we now have confirmation that the tablet is getting an update already.
Google gave away this tablet to all the attendants of their Google I/O 2012 event so there are already enough Nexus 7 units in the wild.
Google is delivering the Android 4.1.1 update with no specific changelog. Online sources indicate that it improves the performance of the UI in addition to some bug fixes. Google Wallet also has arrived on the device with this update.