Google Maps has recently become my route planning site of choice over Mapquest simply because it is more fun and (I think) easier to use. What I like is how you can click and drag the map around instead of clicking on compass points and moving in clunky square-shaped jumps. You can also look for non-specific addresses, like where all the Blockbuster Video stores are in a certain zip code.

Just recently they added a satellite imagery feature up in the upper right corner so you can toggle between a traditional street map and super cool satellite photos of the same view. Now I can literally see my house from here!