I have a Garmin GPS 3+ which allows loading of MapInfo data so you can get very detailed maps of 7 counties at a time or so. I’ve heard a rumor that McDonalds is going to make available a free upload to the GPS 3+ that will locate every McDonalds in the North and South American continent, to be used with the built-in MapSource info.
You know, I’d get it if they did it.