There are several trail/GPS tracking websites out there, i've been looking at them to integrate with my
Facebook Ride Log App. Since there are several I think im going to allow the user to select which 3rd party service they want to use.
So i'm excited to see you have an API allowing me to do this!
The Google Earth 3d playback is pretty rad, i've seen other sites have a 2D map playback, but not 3D. I do like the height graph that other sites like
www.everytrail.com have, maybe something to consider adding.
It would also be nice to be able to see the attached photos in a larger view, same with the videos.