Excelent point GoldenRivet!
Any Dev's listening in: please make the earth round!!
This hasen't anything to do with being hard core or not.
The earth simply ís round.
It would be nice touch to have to do great circle courses.
Fore anyone unfamiliar with this, it isn't halve as scary as it sounds.
Actualy, there's a very simple solution: great circle maps.
A straight line on one of those, automatically is an greatcircle course.
They could do it this way, zoom the map out far in enough to have it change to a great cicle map, do your course plotting on that for long distances. And you don't have to do any calculations what so ever. Zoom back in and you'll see the course line start to curve.