So, the Mafia Wars Marketplace that has been mentioned over the last few days was just added into the game.
Essentially, the Godfather store has become flash-based. Note the menu bar on the side - you can scroll through for a variety of items of different sorts. This effectively lets Zynga sell more items in the Godfather store without making the page look cluttered.
There is no real significant changes except that now you can buy practically every type of boost and a large variety of limited edition loot pieces.
One of the more noticeable changes actually has nothing to do with the new interface, but rather the fact that there are now limited edition loot pieces which have a decent stat advantage over best-in-slot loot pieces.
Example of a few items you can buy:
Widowmaker (weapon; 27 attack, 52 defense)
Twin AK 47's (weapon; 52 attack, 26 defense)
Twin Garza 9s (weapon; 53 attack, 24 defense)
Love Birds (weapon; 26 attack, 53 defense)
Armed Doorman (armor; 51 attack, 24 defense)
Motorcycle Jacket (25 attack, 50 defense)
Mountain Goat (vehicle; 22 attack, 52 defense)
Crop Duster (vehicle; 52 attack, 28 defense)
While it was about time they made limited edition loot pieces worth while, the thing is that these higher end items now cost 35 godfather points. Ouch!
That seems like all with the Marketplace.. just expect 5-15 new limited edition loot pieces each week rather than the normal 3 pieces.