This is an ‘Unparsed’ address, letting Yahoo decode the address components, and results in a pretty close lat/long position:
http://where.yahooapis.com/geocode?appid=[myid]&q=25+W+Main+St,+Madison+WI+53793+USA
This is a parsed version that I would think would be more accurate, but returns a lat/long about 5 blocks away in the middle of a lake:
http://where.yahooapis.com/geocode?appid=[myid]&house=25&street=W+Main+St,&city=Madison&state=WI&postal=53793&country=USA
has anyone else had similar results?