How much hi-res terrain can be on the PocketPC?
We’ve found that hi-res terrain for a plan from Sacramento, CA to Oshkosh, WI would fit on a 64Mb iPAQ with room to spare. Nowadays, a 1Gb SD card is so inexpensive, that it might be worth getting one and putting the terrain for your whole country or continent on it. Then you’ll never be waiting to copy data to the PDA.