I have used TomTom on my my Palm phone in Paris and it worked very well. They have various versions for Europe that are very strong and some support for USA maps. Running on a Palm is quite nice because it's easier to have it with you and consult than it is to do so with a laptop next to you while you are driving.
[This message has been edited by richard (edited 07-27-2003).]
[This message has been edited by richard (edited 07-27-2003).]