Thank for an informative review. I intend to purchase a iPAQ 2215 for use with an older Garmin 12XL GPS. Q. How do I get GPS data into and out of the PDA? I will be using the CF slot for a video card. My GPS provides three wires: data in, data out and ground. To use a PC, I would connect a serial socket. What do I do/need for the PDA? Thanks, Carl