Just yesterday, Android 4.4.1 went from rumor to reality thanks to Google’s Director of Android Engineering Dave Burke, who shared a few details about what 4.4.1 would bring with regards to the Nexus 5. Then we saw the first few Android 4.4.1 OTAs trickle out for lucky Nexus 4, Nexus 5, and Nexus 7 (2013) LTE device owners. We also saw the release of the Android 4.4.1 source code to the AOSP later in the evening.
While Google has been delivering these updates in a rather timely manner, many devices in the current Nexus lineup are still left out. These include the original Nexus 7 (both WiFi and mobile data), Nexus 7 (2013) WiFi-only, and the Nexus 10. Thankfully, Google has now started the incremental OTA rollout for the Nexus 7 (2013) WiFi-only model.
As was the case with the updates for the Nexus 4, Nexus 5, and Nexus 7 (2013) LTE, this is a staged rollout. In other words, not all devices will get the update initially. However, you can download the update directly from Google’s update server, and sideload the update using adb sideload <filename> from your stock Android recovery. Keep in mind that since this is an incremental update, your Nexus 7 (2013) WiFi-only device will have to be on stock KRT16S with stock recovery to upgrade to this new KOT49E build.
For reference, all known OTA links for the current Nexus lineup can be found below: