Well, now Smith is shouting out more DFW love on his blog, Fors Clavigera:
I feel some of the same sense of gratitude for DFW that Smith expresses in his first post, and in the latter, Smith is referencing a brilliant 1990 essay, "E UNIBAS PLURAM," published in Wallace's A Supposedly Fun Thing I'll Never Do Again, which is easily the most funny+brilliant book I've ever read. I mean that.
Side-note: James K.A. Smith bears an eerie resemblance to my brother, Matt, with whom I was just talking to last night on the phone about (amongst other things) both DFW and Smith.