$3.79/gallon in the Lehigh Valley, PA
I can get it about .15 cheaper at Costco, but I rarely fuel up there because I've noticed that I lose about 2 mpg using their fuel. I have a few friends who've experienced the same with Costco. I don't think it's the greatest quality fuel they sell.
But people don't care. The lines at the fuel pumps there are backed up into the parking lot pretty much from open to close. I'm not going to wait 20 minutes to fuel up to save a couple bucks.