If you have access to an xml you can use something like this:

    $(function() {
        $.ajax({
            type: "GET",
            url: "myxml.xml",
            dataType: "xml",
            success: function(xml) {
                $(xml).find('infoContainer').each(function() {
                    var day = $(this).find('nodeName').text();
                    $("#xml-container").append("<div class='day'>" + day + "</div>");

                        }
                    }
                }); 
            }
        });

more information: http://think2loud.com/reading-xml-with-jquery/

try feedburner or widgetbox

You might want to try Yahoo! Pipes. Visually construct and manipulate data and then select on of the many options they provide for embedding it on your site.