On the PHPClasses.org blog there's a new tutorial showing how to use the goe-location support the Google Maps API offers to search for and find an address.
Sometimes it is necessary to get the coordinates of a location on the map. The map location plug-in lets the user point to any location by clicking on the map. [...] However, when the user does not know exactly where is the location he is looking for, it may be painful to find it just by zooming and looking around the map. The latest release of this plug-in makes possible for the users to type the address or name of the city you are looking for and search for the location without further effort.