CycleStreets
Here's a nice thing: CycleStreets is a cycle route planner that uses OpenStreetMap and will calculate a "quietest" route, as well as the usual "shortest" and "fastest". It gives map snapshots along the route, an journey time based on a range of speeds, and a Google Earth flypast (if you have it installed). Pretty nifty - I like the "avoid dismounts" option too.