Google has finally posted factory images for the latest Android update for all current Nexus devices, including the LG Nexus 4, the ASUS Nexus 7 (WiFi and 3G versions), and the Samsung Galaxy Nexus (GSM version only) and Nexus 10. The CDMA Galaxy Nexus is still stuck on Android 4.1.2, along with the Nexus S. Unlike the latter, however, the CDMA Galaxy Nexus is expected to be updated eventually, although Verizon and Sprint will have to approve those updates, and they’ll likely come at different times.
Also of interest for developers is the release of the Android 4.2.1 binaries.
The factory image is a great thing to have around for rooted users, especially if you like to do lots of tinkering and routinely mess things up; they offer a quick way to restore you device to its factory settings. I know I’ve messed up a few things on my Nexus 7 myself in the past, so it’s great to finally see this available for anyone to download.[Google Developers: 1, 2 via Phandroid]