I learned something this week. The laptop I have has an AT&T cell card built into it (this I already knew). But, what is cool is the GPS that you find on cellphones is also available in the laptop off that cell adapter. So, driving with the laptop on the computer desk on the passenger's seat - the laptop GPS was running - and I was able to use the vendor's Google or Bing maps to pinpoint where I was. No extra GPS attachments.
And, I fired up Delorme's TopoUSA software product and it found the built-in GPS and used that for tracking the route I was driving.
I have always driven long trips using a laptop and Delorme's software with an external GPS. But, with this setup the GPS unit is not needed.
Oh well - at least I think this is cool.