A new post on the Ultima Forever forums warns of a brief outage that will take place tomorrow:

Tomorrow morning (Oct. 16, at 10am EDT / 7am PDT), we’ll be performing some minor maintenance that will affect players using Facebook login. For those players, there will be a small window of time (roughly 2-5 minutes) where they will be unable to log into the game, nor search for Facebook friends from within the app.

So if you normally pop in to Ultima Forever during your morning commute…well, you should still be able to, but there might be a short interruption thereto.