Google Earth and this file are free. Just unzip the file and open the .kml file. It should load up in Google Earth. Unfortunately, I don't think Google Earth works with Linux, except maybe under WINE.
I like the way the map highlights which are the most dangerous routes. I just moved to a part of SW Portland that only has one, infrequent bus (#43), so I've been considering getting a bike to get to downtown faster. Anyone know a shop with reasonable prices? I merely need a hybrid cycle, helmet, lights, and a basic lock. River City looks decent. The Bike Gallery and Gateway were way too expensive.