Walk Score

I love this: Walk Score helps "homebuyers, renters, and real estate agents find houses and apartments in great neighborhoods. Walk Score shows you a map of what's nearby and calculates a Walk Score for any property. Buying a house in a walkable neighborhood is good for your health and good for the environment."

BTW, Twitter HQ's Walk Score is 91 out of 100. (And we're hiring.)

walkscore

via Joel