On at least one server, they turned all of the NPCs in PoK into Orcs...still work as normal, just Orc illusi.. Also, they have run 3 or 4 events this month in Rivervale, one was to kill a "crop ravager" or something that was destroying all the halfling farmer's crops. As to what will happen on 10/31, I don't know, but will be interesting to see.
Cheers