Oh, and I don't expect this will surprise anyone, but Swen confirmed no day/night cycle in the game.
He only mentioned this in passing and didn't elaborate at any length on the rationale, but I took what he did say to indicate that it would have been anathema to them to half-arse it, but that properly implementing all the systematics night-time adventuring would imply was judged to be too huge a task.
"You may call it 'nonsense' if you like, but I've heard nonsense, compared with which that would be as sensible as a dictionary!"