The savings are in the ball park that R. and I discussed: depending on the cost of public transportation, insurance, cost of parking etc., the savings are $10K +/- depending on the city and the details of the situation. The source is a public transportation association, but I doubt there's an unbiased source on any transportation related subject of any sort in this country anyway.
Obviously, if I'm posting about car/no car costs, I don't have a newborn yet.
R. and A. have been paying patty cake (his hand, her foot). It's very cute. Especially when she kicks hard enough to move his entire hand.