As a alternative to export tracks in KML format and then use Google Earth, now you can use Virtual Earth 3D (Beta) and display tracks in 3D, directly in your browser.

To do this, first display a saved track, then select “Virtual Earth” in the map provider combobox and wait some seconds in order to load API (in IE, after a info dialog, you must reselect Virtual Earth again).

The Virtual Earth map appear. Now press 3D in the toolbar (note: in firefox, for some strange reasons, labels are hidden! Move the mouse near the VE’s toolbar and click when the tooltip indicating 3D map appear).

If not yet installed, a popup window will help you in installing the plugin