Joel on Software has a great post about a site called Walk Score that lets you put in your address and find out how walkable your neighborhood is. I have several friends looking for apartments right now and this is a pretty killer.
I was pleased to find my apartment has a 91 out of 100 walk score.

and my parent's house in Southern California has a score of 54 out of 100 - which is about how I remember it being in my pre-driver's license youth.
