Just a quick note to anyone waiting for full OS factory images and drivers for existing Nexus devices (outside of the Galaxy Nexus, which bit the dust with KitKat) - as is customary, they will follow over-the-air updates released according to Google's favorite timeline: "in the coming weeks."

The Nexus 5 factory images will be out later today, but don't sit there hitting F5 expecting factory images for the Nexus 4, 7 (new and old), or 10 to pop up any time soon.

As per Ed Heyl, the Google release engineer who replaced JBQ:

We are making the proprietary binaries and factory images available for the Nexus 5 today as well.

In the coming weeks, other Nexus devices (Nexus 4, 7, and 10) will receive their KitKat update, and we'll make those proprietary binaries and factory images available at that time.

Source: Android Building