This is a great tool, thank you Joel!  Basically you enter an address and Walk Score looks it up in Google map automatically collecting a list of interesting places you can reach on foot and finally computing a walkability score.  How easy it is to move on foot in your neighborhood?  Do you need a car?  The place where I work got 80 out of 100 which is defined as “Very Walkable: It’s possible to get by without owning a car”.  In fact I own a car by I never use it to go to work.  I usually ride a bicycle and believe me, it’s great.  I can’t stand the stress of traffic jams.