The following JQuery script will fetch the RSS feed from multiple sources and then save the data into the SharePoint 2007 list via lists.asmx:
<script src="/Scripts/jquery-1.8.0.min.js" type="text/javascript"></script>
<script type="text/javascript">
  
    function LoadFeed() 
    {
        var varFeedURL = new Array();
            varFeedURL[0] = "http://feeds.bbci.co.uk/news/business/rss.xml";
            varFeedURL[1] = "http://www.ft.com/rss/home/uk";
            varFeedURL[2] = "http://www.ft.com/rss/home/us";
            for (i = 0; i < varFeedURL.length; i++)
            {
                $.get(varFeedURL[i], function(data) {
                    var $xml = $(data);
                    $xml.find("item").each(function() {
                        var $this = $(this),
                            item = {
                                title: $this.find("title").text(),
                                link: $this.find("link").text(),
                                description: $this.find("description").text(),
                                pubDate: $this.find("pubDate").text()
                        }
                        
                        
                        //Show only Today's Items
                        var a = new Date(item.pubDate);
                        var b = new Date(); //Today's Date
                        
                        var msDateA = Date.UTC(a.getFullYear(), a.getMonth()+1, a.getDate());
                           var msDateB = Date.UTC(b.getFullYear(), b.getMonth()+1, b.getDate());
                                                   
                        if (parseFloat(msDateA) == parseFloat(msDateB))
                        {
                        
                            var content = document.getElementById('content');
                            content.appendChild(document.createTextNode(item.title)); 
                            content.appendChild(document.createElement('br'));
                            content.appendChild(document.createTextNode(item.description));
                            content.appendChild(document.createElement('br'));
                            content.appendChild(document.createTextNode(item.link));
                            content.appendChild(document.createElement('br'));
                            content.appendChild(document.createElement('hr'));
                            
                            CreateNewItem(item.title, item.description, item.link);
                        }
                        
                    });
                });
            }
        alert('Done');
    }        
        
        
        function CreateNewItem(varTitle, varDescription, varLink) 
        {
                    var batch =
                        "<Batch OnError=\"Continue\"> \
                            <Method ID=\"1\" Cmd=\"New\"> \
                                <Field Name=\"Title\">" + varTitle + "</Field> \
                                <Field Name=\"Description\">" + varDescription + "</Field> \
                                <Field Name=\"Link\">" + varLink + "</Field> \
                            </Method> \
                        </Batch>";
                
                    var soapEnv =
                        "<?xml version=\"1.0\" encoding=\"utf-8\"?> \
                        <soap:Envelope xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\" \
                            xmlns:xsd=\"http://www.w3.org/2001/XMLSchema\" \
                            xmlns:soap=\"http://schemas.xmlsoap.org/soap/envelope/\"> \
                          <soap:Body> \
                            <UpdateListItems xmlns=\"http://schemas.microsoft.com/sharepoint/soap/\"> \
                              <listName>RSSData</listName> \
                              <updates> \
                                " + batch + "</updates> \
                            </UpdateListItems> \
                          </soap:Body> \
                        </soap:Envelope>";
                
                    $.ajax({
                        url: "http://portalstg.amr.kworld.kpmg.com/_vti_bin/lists.asmx",
                        beforeSend: function(xhr) {
                            xhr.setRequestHeader("SOAPAction",
                            "http://schemas.microsoft.com/sharepoint/soap/UpdateListItems");
                        },
                        type: "POST",
                        dataType: "xml",
                        data: soapEnv,
                        complete: processResult,
                        contentType: "text/xml; charset=utf-8"
                    });
                }
                
                function processResult(xData, status) {
                    //alert(status);
                }
        
  
    </script>
<input id="btnGo" onclick="LoadFeed()" type="button" value="Get RSS Data" />
Ref: http://weblogs.asp.net/jan/archive/2009/04/10/creating-list-items-with-jquery-and-the-sharepoint-web-services.aspx
