In case you were wondering how much taxes and retail markups make up in pump prices, here are the prices listed in the commodity section in the Wall Street Journal of March 7, 2008:
Regular gasoline: $2.49
Regular gasoline, CARB: $2.73
Diesel, 15ppm sulfur: $3.27
The Wall Street Journal is commonly found in libraries, so if you need to look that up (or other things found therein), just go to the library.