pingo

<script type="text/javascript" src="PATH_TO_PLUGIN/jquery.ui.map.services.js"></script>

$('#map_canvas').gmap().bind('init', function(event, map) { 
    $(map).click( function(event) {
        $('#map_canvas').gmap('addMarker', {
            'position': event.latLng, 
            'draggable': true, 
            'bounds': false
        }, function(map, marker) {
                        marker.__gm_id
        });
    });
});