That's awesome- congrats! How long is your daily commute, and what other things did you consider to make the choice to go car free?
My commute is a little less than 3 miles one way, all flat. There is a huuuuuuge hill that I have to get over that only has a 55 mph road on it between me and the college where I'm taking classes, but students get free bus passes, so I just take the bus to class.
The main thing that I kept thinking about was all of the investments I could make with my insurance premiums. I only drove my car once this year - to visit my folks for Easter. They live about 20 miles out of town, so going to visit them on my road bike isn't a huge deal. My car was also too old to take advantage of "per-mile" insurance. So it was really a huge money sink. There is also a car-rental place less than a quarter mile from my apartment, so that's an option too.
If I do get a car again, I will probably get an economy pick up or something.