I found out from Nick at Knack that there's no built in way to show a No Data message for a List. He cooked up this bit of jquery that works perfectly. Thanks a mill Nick.
Substitute your view#.
$(document).on('knack-view-render.view_80', function (event, view, data) {if($(‘div.kn-list-content’).children().length < 1 ) {
$('#' + view.key + ' .kn-list-content').html('<p>No Data!!</p>');
}
});