We already do have a place to upload *.xml files that are full of gps track records from a group event and see them play out over a back drop of google earth. Thanks to California cat sailor Glenn Brown for building this program and offering it on the internet.

He provides instructions on how to tweak your browser (IE) so that you can play your file from your own host, on his player. Once you have made it work properly, you can send him the file and he may place it on his server so that others can view it without having to tweak their browsers.
Glenn's instructions

Here is an example. This is a file where we had a few boats loggning their tracks on a Catalina Island trip. Glenn Brown's gps track player

GARY