You find below the HTML code of the visualisation.
You can copy and paste the code into an existing HTML page.
For more information see also ?print.gvis

<!-- Map generated in R 2.16.0 by googleVis 0.3.1 package --> <!-- Tue Oct 23 19:10:57 2012 --> <!-- jsHeader --> <script type="text/javascript" src="http://www.google.com/jsapi"> </script> <script type="text/javascript"> // jsData function gvisDataLondonMap () { var data = new google.visualization.DataTable(); var datajson = [ [ "EC3M 7HA", "<a href='http://www.lloyds.com'>Lloyd's</a>" ], [ "EC2P 2EJ", "<a href='http://www.guildhall.cityoflondon.gov.uk/'>Guildhall</a>" ] ]; data.addColumn('string','Postcode'); data.addColumn('string','Tip'); data.addRows(datajson); return(data); } // jsDrawChart function drawChartLondonMap() { var data = gvisDataLondonMap(); var options = {}; options["showTip"] = true; options["mapType"] = "normal"; options["enableScrollWheel"] = true; options["width"] = 500; options["height"] = 300; var chart = new google.visualization.Map( document.getElementById('LondonMap') ); chart.draw(data,options); } // jsDisplayChart function displayChartLondonMap() { google.load("visualization", "1", { packages:["map"] }); google.setOnLoadCallback(drawChartLondonMap); } // jsChart displayChartLondonMap() <!-- jsFooter --> //--> </script> <!-- divChart --> <div id="LondonMap" style="width: 500px; height: 300px;"> </div>