Title says it all. After logging in, I am stuck on the black loading screen. It seems that other people are experiencing this as well (based on a couple posts on Reddit). We would like an update and/or announcement soon.
Stef will try to find out what happened, most likely a server either shut down or was unresponsive for reasons that can hopefully be determined.
At the moment it seems to work (not sure if the problem "resolved itself" or Stef actually did something earlier).