I think we have seen the last of the cheap gas. It will not fall below $1.50 or $1.60 in my opinion. In the late spring, early summer, prices will go again up to and over $2.00. Part of the reason is, like someone said, out wasteful habits such as driving an Excursion with only one person. Also, everyone seems to be inclined to drive 10-15 mph over the posted speed limits, from what I am seeing. My unverified tests with my scanguage in my Sonoma shows about a 2-3 mpg improvement from going 60 as opposed to 70.
Of course I am not telling anyone how to drive. But as long as we continue to buy and drive new vehicles getting 8-9 mpg, the prices will stay as they are or go up. The energy companies are elated. It doesnt make much sense if a person hops into their Excursion, drives 80-85 mph to the gas station to fill up, and then complains how high the price of gas is. I am not directing this at anyone in particular, but just venting.
If a large percentage of us were to get vehicles getting 35-40 mpg, it may make a difference in the price, perhaps creating a "glut" of oil/gas. But I dont see that happening with our love affair with the SUV/SUT or whatever tag gets attached next.