I love google earth.  It runs great on my desktop, but I want to run
it on a small portable. Is there a portable out there that will run
google earth smoothly over wifi, and has a slot that will take a GPS
card (or external GPS)that will integrate (show my position on the
screen) with google earth?    If I can't find this ... how close can I
get.          Thanks, Don L.

The only think you can do is to use a laptop. Google Earth only runs
on computers and not on handhelds. If you have a small laptop or
subnotebook than this is the way I will work. You only need a WiFi
Card and hotspots around you.