id say i have saved greatly. i went from a 10mpg 350+hp street car i built when gas was cheap to a 70+mpg moped to a bike. i still use the moped once in a while for fun and to keep the engine going but 90% of the time i ride a bike and 9.9% i walk.
sence getting rid of my car ive only spent around $50 on gas and thats in over a year.
most people i know spend $50 a week (or two) in gas.

i wish more business and emploiers would be more willing to accomidate bicycles but a last they are not.

on a funny note i do sometimes pay a parking garage to lock my bike to there rack thats both video servalence and the booth worker can see the racks. i only do this if im on a bike ive spent more on and have to run down town for some reason.