Here's a list of all the objects and events you can use addListener() with:
Key.onKeyUp
Key.onKeyDown
Stage.onResize
MovieClipLoader.onLoadComplete
MovieClipLoader.onLoadError
MovieClipLoader.onLoadInit
MovieClipLoader.onLoadProgress
MovieClipLoader.onLoadStart
Selection.onSetFocus
TextField.onChanged
TextField.onScroller