[Mr. Fixit]

через цикл проходи...

function upListener(event : MouseEvent) : void {
    var item : Sprite = event.target as Sprite;
    var hittedItem : Sprite;

    item.stopDrag();

    for(var i : int = 0; i < rectContainer.numChildren; i++) {
        hittedItem = rectContainer.getChildAt(i) as Sprite;
        if(item != hittedItem && item.hitTestObject(hittedItem)) trace('hit ;)');
    }
}