Marty Ross wrote:

I'm also interested in learning what other cool things folks are doing with
aviation GPS track logs! I do know about http://www.gpsvisualizer.com/,
which is really cool for plotting your track logs against maps (many types
included!), and it's free (or, at least it was when I last tried it).

It's still free. And it can now create Google Maps and KML files for
use in Google Earth, including "absolute altitude" KML files:
http://www.gpsvisualizer.com/map?form=googleearth



Adam Schneider

http://adamschneider.net/
http://www.gpsvisualizer.com/