I ended up ordering Garmin's GPS 18 USB receiver for my Laptop
http://www.garmin.com/products/gps18/ and a copy of MS Streets &
Trips. Although Garmin's product comes with a software package called
City Select North America v5 its coverage for Canada and the
Canadian Maritimes appears very limited and thats where we're traveling
quite a bit. It also forced me to order a DC power adapter for my
Laptop but thats not such a bad thing to have since we use a cellular
data internet service. My wife can surf the internet for longer than the
charge of a battery while I get to drive..