Originally Posted by manneca

I'm thinking of adding GPS to my Treo 650. It looks to me like TomTom is my best choice. But, I'd love to be able to use it for hiking, too. National Geographic makes topos that you can download to a PDA. They will work with a GPS system, but the website notes that they will work with a bluetooth connected GPS/PDA only if it runs Windows PDA software.

So, I have a couple of questions. If I bought the TomTom system, can I load different maps into my PDA and still use the GPS hardware? Is there a way to convert maps from other sources to maps that I can use with a GPS. Does anyone have any different suggestions for one unit that I can use for both hiking and driving?

On the other hand, I'm thinking of getting an iPhone in the next year (assuming 3G, more memory, and possible GPS). Maybe I should just wait. Of course, I am always waiting for tech to catch up with my desires.