These items are (clearly) limited edition, and come in the form of a Guillotine and a Costume Shop. The Guillotine is a military item, with 125 Attack and 20 Defense points, while the Costume Shop adds 750 Trade Points to your town, but also earns 950 coins every eight hours (the type of coins that you have to remember to cash out in order to earn).
There are less than 10,000 units of the Guillotine to go around but it seems as though the Costume Shop will just be available to all those that go shopping this weekend for it. Either way, both items will set you back 25 Gold pieces.
Check out the rest of our Halloween 2010 coverage right here.
Will you pick up either of these new additions in City of Wonder? Let us know in the comments.