From Manitoba, Canada:
Been hitting the "Check for updates" button twice a day since they announced the OTAs. Nothing, even with clearing cache/data for framework services. This morning I was awake early, and figured I'd just download the factory image and do it myself.
No joy. Download failed on my desktop (4 different attempts, 2 different browsers).
BTW, tablet is rooted but running stock 4.3. I was going to unroot and see if it would snag the update that way, but I didn't bother when I couldn't download the factory image anyway. I'm out of town all next week so maybe by next weekend I'll have an update waiting for me!