Looks very interesting, but I was hoping for an LTE option, especially since they lead off with "Mobile first, Cloud first."
Ironically, since they gutted a fair amount of the integration features that differentiated WP from other platforms, WP8.1 would probably "get smoked by" WP8. I'm guessing we won't see that...
Commencing 8.10.12359.845 update on my Lumia 1020.
Tiger Direct has the 520 for $89.99 & free shipping today....
Unfortunately, when I tap Photos on my 8.1 preview Surface Pro, it says "Sorry, there was a problem. Please try again later." Obviously, they still have a ways to go yet.