Yahoo provides their Geocoding Web Service to allow you to find specific latitude and longitude for an address; it's also useful for cleaning addresses where you're not sure of the exact zip code, spelling of the street, etc. There are actually two web services - the orginal Yahoo Maps Web Service, and the new PlaceFinder service. The original web service has been deprecated, but that's what I'll be demonstrating today; the next post will be about the new PlaceFinder service. The first step is to...