I didn't get a pic of it, but I saw a gas station in Oklahoma (I think? Or maybe it was Missouri) that already has an E15 option, lol.
Here's a pic of my MPG from the trip up north & back. Note that the mileage is corrected because I'm running 215/65R16 tires, GPS shows that the dash is off by 5.9%; total trip just under 2135 miles.