It's been out since December. I didn't have trouble finding it with the figure on Ebay at all.
Evil is the main character in this one. It takes place at night instead of midday. Instead of dancing against each leader five times, you dance against each leader twice and the shopkeeper twice. The Series 6 characters will challenge you after you finish an area. The biggest change is the addition of Hard difficulty level.
Wow December... guess I just got mixed up and thought Music Night was just a music CD and not a game (whereas its separately both!) and therefore overlooked this section of the forum after I was done with Music Hour. I really enjoyed the Music Hour game.
Thanks for the rundown of the changes. A new difficulty level definitely sounds like an improvement!
I look forward to the pic. The product pictures I found just show the figure inside the box behind the shiny cellophane wrapping.