package
{
    import flash.display.Sprite;
    import flash.display.StageAlign;
    import flash.display.StageScaleMode;

    import qnx.ui.text.TextInput;

    public class Pinky extends Sprite
    {
        static public var mainInstance:Pinky;

        public var nameInput:TextInput;

        private var newWindow:NewWindowClass;

        public function Pinky()
        {
            mainInstance = this;

            nameInput = new TextInput();
            nameInput.text = "JohnPinkerton";

            // for some reason the new class is created here
            newWindow = new NewWindowClass();
            // ...blah blah blah

        }
    }
}

--------- X -----------
NewWindowClass.as
-----------------------


public class NewWindowClass extends Sprite
{
    public function NewWindowClass()
    {
        // look how to access the other class public variables.
        var name:String = Pinky.mainInstance.nameInput.text;
        (....)

    }
}