Or you could go super-high end and get AutoCAD. I think I am going to put all of my campaign maps on the same drawing and in scale. That way I can just zoom in to print out the 5' square maps for encounters then zoom out to the overland 12 mile hex grid. It gives a great overland means to keep track of what is where and how far using the overland traveling estimates in the SRD. Import images of the baddies that you are going to fight, plans from other programs, or 3D shots of places you had seen rendered somewhere.