I was just thinking about this very thing on my way to work today. We have definitely condensed our driving as much as possible, combining errands and trips whenever we can, and we actually sometimes pass on a social gathering that we would perhaps have gone to in the past (granted, if we're passing on it because of gas prices, we probably didn't really want to go in the first place).
I am a business owner, and I really think that gas prices and the overall increase in prices of groceries, etc, are noticeable here. I own a tutoring center, and I really think we lose some clients because they have to trim somewhere and tutoring is no longer in the budget. It's a shame because some of these kids really need it. We try to accommodate as much as possible, but a line is drawn and there are always some who still can't make it work. It's sad. I, too, miss the days of 87 cents a gallon.