Just got back from a week in WDW, and I tried a search to see if anyone posted this yet, so I'm sorry if it's old news...(don't read on if you don't want to know a single thing about any new effects - just to be careful!).
I rode HM 7 times during my stay, first time on October 6. I was excited to see the pictures in the attic are "working." The husband's heads appear and disappear, and they look awesome! Gotta tell you, Constance freaks me out! Just hearing that, "As long as we both shall live" and picturing that ax....*shiver*
I mentioned to the exit CM how cool they looked, and she replied that she hadn't ridden with that effect working yet, and she was looking forward to checking them out.
Went to MNSSHP on 10/11 and 10/12 and the CM's at Mansion were so into it...you could tell they were having a blast, and so was I! They also had a CM named "Renata" lounging around the grass by HM interacting with guests. Apparently, she is supposed to be one of the ballroom ghosts. She was pretty funny while I was in the short queue. Neat touch.
I'll get more info and pics in my TR...not sure when I'll get to it, though.