thank you so much for the input! I thought BB map is pre-loaded, so that data is not needed just like regular GPS. hope one day navigon or tomtom develop a software for BB just like iphone.
If you need preloaded maps, you might want to consider TrekBuddy and Mobile GMaps. These are the only two mapping apps that I know of for the BlackBerry that don't use real-time data. I haven't used either.