DeLorme Earthmate GPS BT-20

Small, easily placed in vehicle on dashboard. It still maintained lock when it got knocked to the floor. Connects wirelessly to both Palm PDA and BlackBerry. Drives Google Map Mobile software (free) on BlackBerry. Software works well on Palm PDA and...

Quirky user interface of Windows-based software (more user-hostile than it is user-friendly). Hard to learn

Provides good GPS positioning using Palm TX

Hoped to use this as a navigation device on my Palm TX. Can only load a map for 1 urban area at a time. Could not load all of southern CA at once. Takes 2 min or more to find an address. Routing or re-routing not practical on the Palm. Routes must be...