Got directions but want to walk the distance instead of driving? Well, we're glad to see that Google Maps has now added a new walking option for directions, thanks to popular demand. Similar to getting driving directions, after entering your origin and destination, click "Walking" at the top left panel. You can see an example of this in action here. You can also drag the purple line around if you want to go by another specific route. Done, and done. (But maybe they will add a bicycling option soon.)
Via ::Google Maps Help Group
Related Links on Walking, Google
Walk Score Ranks The Top 10 Most Walkable Cities in the U.S.
Walk Score: Cool Green Google Map Mashup
TH Forums: Is Driving Better Than Walking?