What I'd like to see is a 'national' map in the front and a local map with each chapter, especially if it's a fantasy-quest.
The first map should use different icons for towns depending on whether they're known to exist, legendary, mythical, or once-were.
Then each chapter map could not only show the characters' progress, there would be penciled-in corrections, additions, and even a few notes ("dead giant's body," "guide's horse eaten by flowers," etc.) which aren't mentioned in the text. Their route through the "trackless forest" should note significant intersections.
Of course, I'd expect the action to get kicked up a notch as they approach "the edge of the world." 
Oh, and there has to be, on the first map, a large black region marked: "Here be dragyns."
Oh yeah I think maps add a great reference to the story that help you get more into it. For stories that span centuries before and after maps add a great deal of depth to the book. Best example I can think of is the Dragonlance chronicles when they have the maps of Ansalon before the cataclysm and what it looked like after the destuction of Istar. It's amazing how much a fiery mountain being dropped on a city can change the landscape.
