I think you would not need outlet in such case.
<html>
<head>
<meta charset="utf-8">
<link rel="stylesheet" href="style.css">
<script src="js/jquery-1.10.2.min.js"></script>
<script src="js/handlebars-1.0.0.js"></script>
<script src="js/ember.js"></script>
<script src="js/ember-data.js"></script>
</head>
<script type="text/x-handlebars" data-template-name="application">
<ul>
<li {{action "focusOn" "index"}}>Intro</li>
<li {{action "focusOn" "about"}}>About</li>
</ul>
{{partial "index"}}
{{partial "about"}}
</script>
<script type="text/x-handlebars" data-template-name="_index">
<nav id="index">
<h1>Intro</h1>
<p>Some intro text</p>
<p></p>
</nav>
</script>
<script type="text/x-handlebars" data-template-name="_about">
<nav id="about">
<h1>About</h1>
<p>About...</p>
</nav>
</script>
<script src="js/application.js"></script>
</html>
and in your applicationController you would have an action to bring focus on specific section:
actions:{
focusOn: function(segment){
//stole it from http://stackoverflow.com/questions/3656467/is-it-possible-to-focus-on-a-div-using-javascript-focus-function
$("#"+segment).scrollIntoView()
}
}