HTTP GET で座標を返してくれる

To access the Maps API geocoder directly using server-side scripting, send a request to http://maps.google.com/maps/geo? with the following parameters in the URI:

以下パラメータ
q — The address that you want to geocode.
key — Your API key.
output — The format in which the output should be generated. The options are xml, kml, csv, or json.

■例
東京都新宿区西新宿2-8-1

http://maps.google.co.jp/maps/geo?key=ABQIAAAAA1f3FX8OXztrMbmPpNYuBBQ6V82ulRYvsn9brKdzrS3jDXGfvRQUdksLnJJHZlcz3Wm7el8I1HmT1Q&q=%E6%9D%B1%E4%BA%AC%E9%83%BD%E6%96%B0%E5%AE%BF%E5%8C%BA%E8%A5%BF%E6%96%B0%E5%AE%BF2-8-1&output=xml

青山駅

http://maps.google.co.jp/maps/geo?key=ABQIAAAAA1f3FX8OXztrMbmPpNYuBBQ6V82ulRYvsn9brKdzrS3jDXGfvRQUdksLnJJHZlcz3Wm7el8I1HmT1Q&q=%E9%9D%92%E5%B1%B1%E9%A7%85&output=xml

※国内ならcomでなくco.jpへリクエストがよいかも