[Wlug] GPS

I have a great little Lenovo netbook and I haven't found a good use for the expresscard 34 slot I've been researching GPS devices but can't find an ExpressCard 34 style GPS device. I could get a normal GPS device with a screen and junk, but that would defeat the purpose of my search. Does anyone have experience with using a laptop with a GPS device? FYI: I already have maxed out the ram and have a 150gig hard drive, plus a webcam and bluetooth...if anyone can think of a better use of the Expresscard, I'd like to hear that, too! Ciao