In flex 1.3 I use widget "LocateWidget"
1/ in "CONFIG.XML" you have to insert new widget
<widget label="Lokalizace X,Y" icon="com/esri/solutions/flexviewer/assets/images/icons/i_flag.png" menu="menuWidgets" config="com/esri/solutions/flexviewer/widgets/LocateWidget.xml">com/esri/solutions/flexviewer/widgets/LocateWidget.swf</widget>
2/ use in project LocateWidget.xml and LocateWidget.mxml