It's hard to give a good answer with this context, but your example will work if you add
this.render('list', {
outlet: 'list'
});
to your renderTemplate hook from ListsRoute. See http://jsbin.com/cuyuy/8/edit
edit: Since the code above is not really the ember way, check out this jsbin with nested routes: http://jsbin.com/hutem/1/edit