[X4U] Self Contained GPS Mapping?

[Joe Sporleder]

I've been considering one of the portable GPS mapping systems for our  
corporate vehicles. I hear names like Garmin and TomTom. I realize  
that one would might need to occasionally update the data on these  
devices via a personal computer. Has anyone heard of any particular  
brand that is more Mac friendly than others for updating the GPS device?

An iPhone with Google Maps would be sufficient for what I need, plus  
it'd be great for when I go biking on the back roads of Kansas.  
Unfortunately, AT&T wireless only serves the major towns and cities  
along the Interstate Highways here in Kansas. Alltel, soon to become  
Verizon, is the best (and sometimes only) cellphone signal in my part  
of Kansas and to the areas of Kansas I travel to. I hope that when 4G  
networks become commonplace, that Apple can offer iPhone beyond AT&T.  
Verizon is talking 4G sometime in 2010, but I don't know how  
widespread the initial roll out will encompass. I'm guessing 4G might  
be several years away from my rural part of Kansas.

Joe