Of course I could always find north if I really wanted to seek it out. I think the cool part about this being attached to your body is that you'll always have that sense of where it is. I'm imagining that eventually you would always have a sense of your place in the world.
There a tribe somewhere the members of which always know where north and south are. They achieved it through the way they orientate within the language. They don't say "behind you" or "on your left": they use absolute angular positioning to determine towards which end of the world the object is. Basically, their brain is being wired to orientate pole-wise from the very infancy. Don't listen to bioemerl: he's a grump if I've ever seen one. Extending one's capabilities is cool, especially so if it pertains to survival skills.