Edit in JSFiddle

var scr = document.createElement('script');
scr.src = 'http://pipes.yahoo.com/pipes/pipe.run?_id=f3f09151da4505bd3c1f9f135f75c775&_render=json&_callback=hbnPiper';
document.body.appendChild(scr);

// My Pipes callback function
function hbnPiper(obj) {
    var i = 0,
        len = obj.count,
        today = new Date(),
        // Yesterday, all my troubles seemed so far away..
        yesterday = new Date(new Date().setDate(new Date().getDate() - 1)),
        weekOld = Date.parse(new Date(new Date().setDate(new Date().getDate() - 5))),
        headlines = [],
        // This will be useful for getting the hostname :D
        a = document.createElement('a');
    
    if (len) {
        
        for (; i < len; ++i) {
            
            // We want news that are... kinda new
            if (Date.parse(obj.value.items[i].pubDate) > weekOld) {

                // Format dates and time to the way we want it (in Sweden)
                var itemDate = new Date(obj.value.items[i].pubDate),
                    newsTime = itemDate.toTimeString().substring(0, 5),
                    newsDate = itemDate.toDateString() === today.toDateString() ? 'Idag' : itemDate.toDateString() === yesterday.toDateString() ? 'Igår' : itemDate.getDate() + '/' + (itemDate.getMonth() + 1);
            
                // Find out source of headline
                a.href = obj.value.items[i]['feedburner:origLink'] ? obj.value.items[i]['feedburner:origLink'] : obj.value.items[i].link;
    
                // Make a list with each headline, date, time and source (hostname)
                headlines += '<li><a href=' + obj.value.items[i].link + '>' + obj.value.items[i].title + '</a> <small>(' + newsDate + ' ' + newsTime + ' via ' + a.hostname.replace(/^www./, '') + ')</small></li>';
                
            }
        
        }
    
    } else {
        headlines += '<li>Det finns inget nytt rapporterat från Hisingen just nu!</li>';
    }

    // Insert list into the ul
    document.getElementsByTagName('ul')[0].innerHTML = headlines;
}

<div id="wrapper">
    <div id="header">
        <div id="logo">
            <a href="#"><img src="http://hisingenbyday.se/wp-content/themes/motion/images/genericlogo.png" alt="Hisingen by night" /></a>
            <h1><a href="#">Hisingen by night</a></h1>
            <div id="desc">Hisingen i nyheterna</div>
        </div><!-- /logo -->
    </div><!-- /header -->
    <div id="main">
        <div id="content" class="full">
                <div class="post-2 page type-page status-publish hentry" id="post-2">
                    <div class="posttop">
                        <h2 class="posttitle"><a href="#" rel="bookmark">Hisingsrelaterade nyhetsrubriker</a></h2>
                        <div class="postmetatop">
                            <div class="categs">
                                Test för att visa rubriker från olika
                                <a rel="category tag" href="http://pipes.yahoo.com/pipes/pipe.info?_id=f3f09151da4505bd3c1f9f135f75c775">källor</a>
                                av Janne &mdash;
                                <a href="http://hisingenbyday.se/kontakta-oss/">Rapportera buggar</a>
                            </div>
                            <div class="date">
                                <span>9 mars, 2012</span>
                            </div>
                        </div>
                    </div>
                <div class="postcontent">
                    <ul>
                        <li>Laddar rubriker...</li>
                    </ul>
                </div>
            </div><!-- /post -->
        </div><!-- /content -->
    </div><!-- /main -->
</div>

@import url("http://hisingenbyday.se/wp-content/themes/motion/style.css");
#wrapper { width: 700px; margin: 0 auto }
#main { padding: 0 }
.posttop { width: 620px }