How difficult is it to convert KML (or GPX for that matter) into the Google Maps API. I wrote two stylesheets that generate the Google Maps JavaScript that make a map containing a "GPolyline" of a route. I used a GPS text file of walk around the Lake District in Cumbria (in England). Surprisingly it is *much* easier to transform GPX to Google Maps than the KML format.
Coding Library: None

More Google Maps Resources:
More Google Earth Resources: