VMK updated before opening today, and there are several changes.
New mail alert sound has been added.
When you open a person's pin/sig screen (by clicking on them), it puts a small arrow over their head.
Shops have been changed. First, many colors are no longer available - for example, most of the turnstile colors are now gone. Second, a new "specials" tab is added on. This has items not included in the main inventory, and presumably will be used for limited-time only items. If so, this will create a nice spike in the trader's market, which they seem to be working on lately. Finally, prices changed on many items. Most went up, a few went down.
A new area is present in Adventureland - Discovery Island. This area seems to be showing off the three new magic pins that will be available through codes you can get through the sponsor's product - Kellog's Cereal. No news yet as to what cereals you'll need to buy, but the spell effects can be seen by going here, picking up a piece of treasure, and then walking the plank for the spell you want.
The Guest Room turnstile item has been changed back - most recently, your character had to walk directly to the item in order to open or close it. It's gone back to being able to toggle just by double clicking. *EDIT* Game crashed on me earlier, now it's back to the character walking to the item to activate.
STREET PARTY MUSIC GAME: Some new graphics in the area, and a new scroller on top of the play stand that shows song title and mixer as you play. This takes the place of the previous (somewhat annoying) popup that gave the same information.
In the mixer itself, they've added the "ok" and "cancel" buttons in to the delete process. Previously both were the same default button.
CASTLE FIREWORKS GAME:
Previously, the idea was to time the fireworks by the rate of flashing before they vanished. The closer to vanishing the firework was, the better the score with the two best categories being "Awesome" and "Flawless". This is still mostly the same, but now at the end of the arc the firework will quickly turn into a star before vanishing. It changes shortly before the end of the "awesome" time period, so it's a nice way to judge timing.
I've also heard something happening with the in-game Mickey hats, but haven't seen anything personally.