Actually, that OMM link reminds me of the developer commentary in Valve's games (the people behind OMM write for Valve), such as Portal. Quite often they explain the thought processes behind areas of the map. I think the free Lost Coast tech demo explains a lot about the fundamentals.
Looking through my collection of links, I've found this one which is pretty good at describing how to pace a level. http://www.gamasutra.com/view/feature/4024/examining_game_pa...