Siehe auch http://www.wduffy.co.uk/blog/remove-address-bubble-from-google-maps-iframe/

function initialize() {
var myLatlng = new google.maps.LatLng(-34.397, 150.644);
var myOptions = {
zoom: 8,
center: myLatlng,
mapTypeId: google.maps.MapTypeId.ROADMAP
}
var map = new google.maps.Map(document.getElementById(“map_div”), myOptions);
}

function loadScript() {
var script = document.createElement(“script”);
script.type = “text/javascript”;
script.src = “http://maps.google.com/maps/api/js?sensor=false&callback=initialize”;
document.body.appendChild(script);
}

window.onload = loadScript;

Hiermit kann man dann noch die Farben anpassen: http://gmaps-samples-v3.googlecode.com/svn/trunk/styledmaps/wizard/index.html