OUCH! diesel fuel at $2.41!

While driving by a gas station which I rarely use, I noticed that the price of diesel jumped 12 cents a gallon to $2.41. That's the most expensive fuel I've seen in my area for self-service period. I'd say that the average price around here is $2.30. It almost negates from an economical standpoint the fuel efficiency of diesel cars.

How much is diesel in other parts of the country?