I finally got to hear the soundtrack version of this track. I saw the movie and it plays over the end credits.
It's the same vocal track, but T-Bone Burnette has completely redone the guitar and percussion tracks to better fit with the rest of the movie soundtrack.
I think I actually like the "original" version better, though I must admit that the version T-Bone produced fits better with the movie.
At any rate, I'm really beginning to wonder if we'll ever see either version on CD.