Someone has created a highly detailed route map of the this years PBP on Google maps. All the features along the way are loving recorded, along with all the controlsAfter.
http://maps.google.com/maps?q=http://cycling.ahands.org/pbp2007/PBP.kml&t=h
You can spend hours fiddling with all the buttons and sliders in Google to get just the route sheet you want. As the route itself is very easy to follow and is well signposted, you may better off spending the time out riding your bike. After all, it all starts 4 months today!!