Hi Tom,
My mind leads me towards node editor, although i am not a scripting guy.

But if we can get one of the guys to make a path array node, then the “distance” value can be put on a slider or a rotation widget. Then you could slide an object around on a path….

I think…..

But A script could possibly iterate the distance over and over till the end of the path also. If you wanted to screen shot and save out an image sequence for an avi….

Anybody?