var foo:IEventDispatcher = new SomeObjectWithBinding();

var bar:Hwatever = new Whatever();

var bindingFunction:Function = 

    function():void { bar.someProperty = foo.someValue; }

foo.addEventListener("somePropertyChanged", BindingManager.executeBinding);

BindingManager.bindings[foo]["somePropertyChanged"] = bindingFunction;

. . .

function execureBinding(e:Event):void

{

   dispatchers[e.currentTarget][e.type]();

}