SNK Playmore released a new iPhone app based off King of Fighters. You won't be pressing buttons to perform combos against your opponents, but the app is free so there's probably no reason to complain.
The King of Fighters Encounter is a social game that makes use of positional information. At the start of the game, you select one of twenty-one characters. As you encounter other players, your games will automatically stage fights. You can also put your character through training to build up experience. All of this will unlock additional characters for use.
If you have an iPhone, download the app from the App Store.