I logged off 3-4 hours ago, when I started having issues loading instances (was getting logged out, and getting the option to log the last character in at a "safe location"). Now, I'm having the same log in problem everyone else is seeing.
I'd surmise that, between the update and the traffic, something unraveled at their end. Nothing for it but to hang tight and see what's what, I'm thinking.
I was having this very same issues and just got booted as i watched my BO's lag pull about 20 Borg hope im still alive would hate to have to fight through that whole ship again.