They are communicating on Twitter, but not on their own forum, so its not strange less and less use forum.
As i saw on twitter ( Using the link on the maintenance page )they updated their messages there 3 times so far, and the reactions there where full of complaints, and not the nicest ones
I looked again and they updated just once saying they are still investigating whats going on (wich doesnt look good to honest, so i dont expect it back today for sure......)
The update was just joined by the Original message, so i counted 3, my fault, not used to use twitter...