Gas around here is $4/gal or more, but that had little to no bearing on whether I commute or not. Parking is $400/month in my building, and I can ride to work about as fast as I can drive, twice as fast as a bus, and 4+ times as fast as walking. Money and time are two of the main reasons I commute, and the fact that I love to ride is right there as well. If I lived close enough to work that I could walk there in 30 minutes or less, I wouldn't ride.