Lisa,You were really close in your app. The mouse over event for the wilderness outlines feature layer provides you access to the graphic via the event argument. From the graphc we can access the attributes by name (see example below).
dojo.connect(featureOutlines, "onMouseOver", function(evt){ // listener for feature layer mouseovers; will add red outline onmouseover and remove it onmouseout
var highlightGraphic = new esri.Graphic(evt.graphic.geometry,highlightSymbol);
map.graphics.add(highlightGraphic);
dojo.byId("wildName").innerHTML = evt.graphic.attributes.NAME;
});