Haven't been able to log in for two days now.
Isn't there a device limit on Netflix?
Maybe check you've not exceeded it.
The last time I heard the limit was 50 devices. I'm not the only one with this problem. Complaints about this is all over the Netflix's review page for in the WP store. A few posts on twitter also.
Netflix | Windows Phone Apps+Games Store (United States)
It's working for me, but I'm already logged in so maybe that's the issue? Which app are you using, the Verizon Netflix app or the official Netflix app?