I don't mind something in the form of "Lord Tabershaw's Keep -- Level 10-20" that gives people the area name and a rough idea of when you think they might get the most xp from the area. It might push people to explore some areas when they are challenging (and, of course, useful for xp) when they don't have other things to do.

Keywords and names of rooms/mobs/objects would be a bad thing though.