the author of this app says:
This brings a 3D globe to your PDA and displays the actual time in more than 10 000 cities. Rotate the Earth, compute distances, watch the sun shadow move, and convert currency.
You can add, modify or delete you own cities and rotate the globe using your stylus. You can select up to 20 cities to be displayed on the 3D model. It can also display Earth in planar mode.