This is just macro-level information, for the most part ... if this were Earth I was describing, for instance, it would list "western Europeans," "Nordic," "Slavic," etc., rather than going into a lot of detail about, say, "English vs. French" or even better, "Scots vs. Irish." ;) But it does help solidify the world in my mind, and makes the map "alive," so to speak, rather than just being a bunch of geographical features with nobody on it.
Right now, the most vibrant part of the map in my mind is Khaldun, although putting Arrendown back on the map (and letting go and just calling it by its proper name of Arrendown) helped a bit. Most of the other areas of the map are names with vague ideas attached to them ... but as I put more detail into who is there and how they got there, the places are gradually getting fleshed out.
Hopefully one of these exercises will germinate some cool story ideas. I'd like to find a nice, juicy epic waiting for me somewhere...
Meanwhile, it's late. G'nite folks!
 By races, I mean it in the true sense of culture, rather than the more common fantasy terminology, where "human" is a race, and "elf" is a race. Strictly speaking, those are different species.