From Forum Nokia Wiki

Take the power of Google Maps with you on your mobile phone.

Real-time traffic — See where the congestion is, and estimate delays in over 30 major US metropolitan areas.

Detailed directions — Whether you plan to walk or drive, your route is displayed on the map itself, together with step-by-step directions.

Integrated search results — Local business locations and contact information appear all in one place, integrated on your map.

Easily movable maps — Interactive maps let you zoom in or out, and move in all directions so you can orient yourself visually.

Satellite imagery — Get a bird's eye view of your desired location.

How to download? Visit www.google.com/gmm on your mobile web browser

http://www.google.com/gmm/index.html