I have done some advanced stuff with the built-in application including ripping it out of the phone and placing it in excecutable form the memory card (so I can backup the waypoints rms files) and trying to remove that stupid nag screen "gps is for outdoo....."

I saw mention of somone using Google maps for mobile accessing the built-in GPS and displaying the map on display, I know the wap charges will be high but it's nice to know that the application ins "there" if need be.