Make your own Google Map

You can customize Google Maps for your own purpose. You can get a free API code here and add overlays with some basic java skills. I played with it for a bit and made this Utrecht Coffeeshop Guide(not completed). This is the most popular Amsterdam Coffeeshop Guide and it could more than use this feature. Nice way to show the address of you business on your site or make whatever you want. Someone needs to make an interface to replace the hard coding.