I'm really leery about using a serial-connected GPS on the iPaq in this application -- I have a GPS-16 for my laptop 'stumbler rig, but I can run that off the laptop's battery and the cabling isn't a big deal.

There are GPS products that can be powered from the PDA, reducing your battery life.

http://www.teletype.com/pages/gps/compatibility.html



Yes, most of the laptop GPS products have a 'bulge' that would present a problem. One of the CF GPS cards would be perfect if you add a "long neck" CF adapter that would also provide some extension to get the antenna bulge of the GPS antenna beyond the antenna bulge of the WLAN card.

Something like this?
http://www.sycard.com/cf162.html