I do like the idea of a Guild University. Or at least, some more formalized criteria for (a) training up new cartographers, and (b) assessing when a cartographer has made certain bench marks. The rep system is a bit too general I think to accomplish this second objective. Of course, it may be difficult to establish either of these objectives since I would imagine either of these would require quite a bit of coordinated effort. Moreover, different schools of thought are bound to crop up as to the appropriate pedagogical philosophy to go by. Still, I think the idea is worthy of consideration.

Cheers,
-Arsheesh