The source code

    FeedViewer = {};

    Ext.onReady(function(){
        Ext.QuickTips.init();

        Ext.state.Manager.setProvider(new Ext.state.SessionProvider({state: Ext.appState}));

        var tpl = Ext.Template.from('preview-tpl', {
            compiled:true,
            getBody : function(v, all){
                return Ext.util.Format.stripScripts(v || all.description);
            }
        });
        FeedViewer.getTemplate = function(){
            return tpl;
        }

        var feeds = new FeedPanel();
        var mainPanel = new MainPanel();

        feeds.on('feedselect', function(feed){
            mainPanel.loadFeed(feed);
        });

        var viewport = new Ext.Viewport({
            layout:'border',
            items:[
                new Ext.BoxComponent({ // raw element
                    region:'north',
                    el: 'header',
                    height:32
                }),
                feeds,
                mainPanel
             ]
        });

        // add some default feeds
        feeds.addFeed({
            url:'http://feeds.feedburner.com/extblog',
            text: 'ExtJS.com Blog'
        }, false, true);

        feeds.addFeed({
            url:'http://extjs.com/forum/external.php?type=RSS2',
            text: 'ExtJS.com Forums'
        }, true);

        feeds.addFeed({
            url:'http://feeds.feedburner.com/ajaxian',
            text: 'Ajaxian'
        }, true);

        Ext.get('header').on('click', function() {
            viewport.focus();
        });

        feeds.focus();
    });

    // This is a custom event handler passed to preview panels so link open in a new windw
    FeedViewer.LinkInterceptor = {
        render: function(p){
            p.body.on({
                'mousedown': function(e, t){ // try to intercept the easy way
                    t.target = '_blank';
                },
                'click': function(e, t){ // if they tab + enter a link, need to do it old fashioned way
                    if(String(t.target).toLowerCase() != '_blank'){
                        e.stopEvent();
                        window.open(t.href);
                    }
                },
                delegate:'a'
            });
        }
    };