For those not willing to wait for the OTA from 4.3 to 4.4 KitKat, you can download the update now!
Our friends over at XDA found the manual installation URLs. One goes from 4.3 JellyBean (JWR66Y) to 4.4 KitKat (KRT16S). The other goes from 4.4 KitKat (KRT16O) to the 4.4 bugfix OTA (KRT16S). It’s easy to install! Just place the zip in your ADB folder and sideload it like you normally would.
Enjoy your KitKat!
4.3 (JWR66Y) to 4.4 (KRT16S) – Download
4.4 (KRT16O) to 4.4 (KRT16S) – Download