The NaNo site has been up and down since it was opened on Oct 1. Yesterday there was a brief period where the response time was amazingly (for them) fast. But, this morning...no response at all.
I would guess (being a retired computer engineer who worked on large server and data base systems) that they've been resetting the server software (witness the fact that you have to sign in even if you've poked the button that says to "remember me") and perhaps have already added the server they said would be added at the end of this month.
It'll get better. In the meantime, get hoppin' on your outline, plot line, character studies. Lay in your supply of caffeine, scotch, wine, chocolate or whatever you need to whack your muse.