With google now charging for maps (http://www.dailymail.co.uk/sciencetech/article-2056128/Google-Maps-start-charging–thousands-sites-apps-hit-fees.html), it might be prime time for an opensource alternative to exist and openstreet map should now fill the void for the bigger sites, OpenStreetMap is a free editable map of the whole world. It is made by people like us. It allows you to view, edit and use geographical data in a collaborative way from anywhere on Earth. Its seems to be a lot cheaper then €4 per 1000 thousand views once you go past 25000 map views on your site!