Android 4.4 KitKat is not yet officially available for Nexus devices, but AOSP builds for the Nexus 4 and Nexus 7 (both models) are available for download.
Owners of the Wi-Fi Nexus 7 (2013) version can get their AOSP KitKat fix from Rootzwiki, while the Wi-Fi Nexus 7 (2012) model has its ROM ready via Paranoid Android. Final fight game download. A Google Apps package for them can be grabbed from here.
There are no proper Google Apps package available right now, so you will have to wait for at least a few hours before someone uploads a working GApps package for Android 4.4. Update: A semi-working Google Apps package can be downloaded from here. Update 2: An AOSP made Android 4.4 ROM for the 2012 Wi-Fi model of Nexus 7 is also up for download now.
Finally, the Nexus 4’s AOSP KitKAT ROM is available for download as well over here (also check out the Google Apps package for it – here’s the link).
We will remind you that we don’t encourage you to install unofficial software on your devices, even if these are AOSP ROMs for Nexus devices. You’ll be the only person responsible for whatever happens during the installation, but in case you decide to go this route, make sure you backup your data and follow the necessary install steps closely.

The Nexus 4, Nexus 7 (both models), Nexus 10 and Google Play editions of the Galaxy S4 and HTC One will be updated to Android 4.4 KitKat in the coming weeks, but we’ll certainly keep you updated on the process.
While the Nexus 4 factory images have been available since last week, the OTA update just recently started rolling out and has yet to reach everyone.
If you’re the truly impatient type, you might have already grabbed the factory image and manually installed, but if you don’t have an unlocked bootloader or are looking for a way to get KitKat without having to wipe your data first — then you’ll be happy to know that XDA developers have now posted links to the OTA zip files.
To get this working, you will need to use ADB sideload in recovery, but it’s still a lot easier than manually installing using a factory image. Of course we’ll remind you that even this procedure requires a little bit of technical know-how, so proceed at your own risk.
Without further ado, here’s the links:
Android 4.4 KRT16S from Android 4.3 JWR66Y
Android 4.4 KRT16S from Android 4.4 KRT16O
For those that are now rocking Android 4.4 KitKat on the Nexus 4, what do you think so far? Did you get an official OTA, or did you go the manual route?