Submitted by Raycrash:

There should be some kind of waypoint mode, so a pig is waiting at point A.
When you take your seat on it, it starts going to it's destination set by Waypoints.
With this iconomy intergration would be nice.

I, too, would like to see a system this developed - similar to what VoxelVoyage does, but with all mobs.
Also, I would be willing to donate $5 to see this addition pushed and added into MobRider.