We've been working on a mobile application for Android phones (T-Mobile in the US) for a few months and are just about to release the app to the general public. The application will display a map of the zip (US only) code along with a pin to display your position.
The app will be free for the first 100 "hits" (one use equals one hit) with annual subscriptions available.
If you're interested in trying this application, please send us an e-mail and we will notify you when it is in the Android Market.
Contact page: click here