Today I'm introducing two new features. The first one is easier to find -- just go to any track with waypoints and mouseover the waypoint images. The map will automatically "pan" (scroll) to that position (i.e. -- the center of the map will be the position of that waypoint).
The second one is more important. Now you can edit the track before publish it. Every uploaded track is saved with draft status. It is not public until the moment you decide to publish it.