Info

 http://zfacts.com/p/35.html for history of changing gas prices.

http://www.fueleconomy.gov/FEG/gasprices/states/index.shtml

for national and state prices.

http://autos.msn.com/everyday/GasStations.aspx?m=1&l=1&zip=60177&x=8&y=13 for local area gas prices.