Originally Posted by
mrmakochan
Also you get a bluetooth gps module to use it with the phone for navigation. You can buy whatever mapping software you want: Tomtom, Wayfinder, etc.
I second this option, I keep my Treo 650 around just to power my TomTom software. The phone doesnt have a SIM in it, so it doesnt have a data connection, but with the 2gb SD card in it i can load every US map and "point of interest" that exists.