A coworker sent 'round
this link to find the cheapest gas prices in your area. You just plug in your zip code. It's not up-to-the-minute accurate, as the price I saw this morning was higher than what was listed, but it'll at least tell you which stations are the most and least expensive.
I know that you folks in Europe are paying a lot more than we are, but it still makes me nauseated to see how much they've gone up, and how fast. It's really scary.