Thanks for the article Raybo. I am currently on a cross country tour. Just started 4 days ago in NYC and going all the way to Seattle! I have my iPHone on me and in the last 2 days or so I have seen the dreaded E symbol on it. Yesterday for a good 2 hours I didnt have any phone service at all. I am carrying maps with me though so its not an issue but having a GPS on my iPhone would serve as a nice fall back to Google maps incase I run into a black zone again. Im pretty confident that I will hit black zones when I get into the Great Plains area but thats still a few weeks away. I will look into TomTom in some depth once more. Thanks.