Lately I've been trying to discover some shortest paths. In particular, I've been looking at paths for smashes, but they are a little difficult, so before getting to those, I started with a path that will lead you to all of the drive thrus. I'm not 100% sure if this path is THE shortest path, but it seems to be the shortest compared to about 8 others I tested it against.
This one can probably be refined further with shortcuts. I think only 1 or two were considered for this path in its current state.
Additionally, I've created an area on the main page for user-defined KML maps. So if you have a map you'd like to share with the community (assuming its a valid, useful map), send me the url and I can link it there on the main page.