I stumbled across an entertaining little blog called "Gas Station Gourmet," succinctly summarized by its author as "I eat weird gas station food and then write about it."
Not related to, although similar theme as, the recent "Gas Station Gourmet Valentine's Day" thread on the Home Cooking Board, http://www.chowhound.com/topics/487063 .
There is lots of writing on the web about junk food but this one gets a bit of extra credibility because the author is a working musician currently on tour: she plays ukulele for one of my favorite new (to me) artists, Canadian singer/songwriter/autoharpist Basia Bulat. So it seems she is really living off the stuff she writes about. Ah, the troubador life . . .