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

<!-- GeoChart generated in R 2.15.0 by googleVis 0.2.15 package --> <!-- Sun Mar 4 11:35:23 2012 --> <!-- jsHeader --> <script type="text/javascript" src="http://www.google.com/jsapi"> </script> <script type="text/javascript"> // jsData function gvisDataCRAN_Mirror_Cities () { var data = new google.visualization.DataTable(); var datajson = [ [ "Aalborg", 9 ], [ "Aizu", 7 ], [ "Berlin", 6 ], [ "Bern", 5 ], [ "Besnica", 5 ], [ "Boston", 2 ], [ "Brisbane", 5 ], [ "Bristol", 9 ], [ "Budapest", 5 ], [ "Burnaby", 9 ], [ "Chapel Hill", 9 ], [ "Curitiba", 9 ], [ "Ferrara", 5 ], [ "Grahamstown", 9 ], [ "Ljubljana", 6 ], [ "London", 8 ], [ "Los Angeles", 9 ], [ "Lyon", 9 ], [ "Madrid", 9 ], [ "Mainz", 5 ], [ "Paris", 7 ], [ "Piracicaba", 9 ], [ "Pittsburgh", 9 ], [ "Porto", 8 ], [ "Taipei", 9 ], [ "Toronto", 9 ], [ "Toulouse", 9 ], [ "Tsukaba", 1 ], [ "Vicosa", 5 ], [ "Wien", 9 ], [ "Wroclaw", 9 ], [ "Zuerich", 9 ], [ "Arezzo", 3 ], [ "Berkeley", 8 ], [ "Houghton", 8 ], [ "Istanbul", 4 ], [ "Koeln", 4 ], [ "Muenchen", 8 ], [ "Sao Paulo", 8 ], [ "Seattle", 8 ], [ "Tsukuba", 8 ], [ "Ames", 8 ], [ "Lublin", 4 ], [ "Milano", 8 ], [ "Nanjing", 4 ], [ "Rio de Janeiro", 8 ], [ "Seoul", 8 ], [ "St. Louis", 8 ], [ "Taichung", 8 ], [ "Amsterdam", 8 ], [ "Antwerp", 5 ], [ "Auckland", 5 ], [ "Bangkok", 4 ], [ "Bejing", 4 ], [ "Bergen", 7 ], [ "Bethesda", 4 ], [ "Bogota", 4 ], [ "Bratislava", 4 ], [ "Buenos Aires", 2 ], [ "Cleveland", 4 ], [ "Cuernavaca", 3 ], [ "Dallas", 8 ], [ "Dublin", 6 ], [ "Goettingen", 5 ], [ "Hannover", 5 ], [ "Hong Kong", 4 ], [ "Houston", 4 ], [ "Hyogo", 4 ], [ "Knoxville", 2 ], [ "Mashhad", 4 ], [ "Melbourne", 8 ], [ "Mendoza", 6 ], [ "Montreal", 4 ], [ "Moscow", 4 ], [ "Oswiecim", 5 ], [ "Padua", 7 ], [ "Palermo", 8 ], [ "San Antonio", 3 ], [ "Santiago", 6 ], [ "Scottsdale", 4 ], [ "Singapore", 5 ], [ "Tokyo", 7 ], [ "Uppsala", 7 ], [ "Utrecht", 6 ], [ "Wiesbaden", 4 ], [ "Zagreb", 5 ], [ "Cambridge", 3 ], [ "Halifax", 3 ], [ "Crete", 3 ], [ "Hamburg", 6 ], [ "Hatyai", 3 ], [ "Nuernberg", 4 ], [ "Corvallis", 2 ], [ "Gdansk", 1 ], [ "Mexico City", 2 ], [ "Quezon City", 2 ], [ "St Andrews", 2 ], [ "Xiamen", 2 ], [ "Bellingham", 2 ], [ "Cali", 2 ], [ "Canberra", 2 ], [ "Hefei", 2 ], [ "Jakarta", 2 ], [ "La Plata", 2 ], [ "Texcoco", 2 ], [ "Chennai", 2 ], [ "Lawrence", 2 ], [ "Oak Ridge", 2 ], [ "Cape Town", 3 ], [ "Davis", 4 ], [ "Tel-Aviv", 4 ], [ "Alicante", 3 ], [ "Frankfurt", 2 ], [ "Chicago", 3 ], [ "Brno", 2 ], [ "Karlsruhe", 2 ], [ "Valdivia", 1 ], [ "Coyhaique", 2 ], [ "Kolkata", 1 ], [ "Pune", 1 ], [ "Tampa", 1 ], [ "Kahramanmaras", 1 ] ]; data.addColumn('string','City'); data.addColumn('number','Years.hosting.CRAN.mirror'); data.addRows(datajson); return(data); } // jsDrawChart function drawChartCRAN_Mirror_Cities() { var data = gvisDataCRAN_Mirror_Cities(); var options = {}; options["width"] = 556; options["height"] = 347; options["displayMode"] = "markers"; options["markerOpacity"] = 0.5; options["sizeAxis"] = {minValue: 0, maxSize: 15}; var chart = new google.visualization.GeoChart( document.getElementById('CRAN_Mirror_Cities') ); chart.draw(data,options); } // jsDisplayChart function displayChartCRAN_Mirror_Cities() { google.load("visualization", "1", { packages:["geochart"] }); google.setOnLoadCallback(drawChartCRAN_Mirror_Cities); } // jsChart displayChartCRAN_Mirror_Cities() <!-- jsFooter --> //--> </script> <!-- divChart --> <div id="CRAN_Mirror_Cities" style="width: 556px; height: 347px;"> </div>