Excellent tune - loved your voice and delivery. C01 did a decent job of miking your guitar.
I liked the harmonica concept, but the performance wasn't always doing it for me - the melody line was too dry, not in the reverb sense, but in the sense there was little to tell us this was a real harmonica and not a sample. bending a few notes, or blowing few chords (with your melody still on top) would make it sound a lot more organic. When it IS chording, the part is good, just needs to be back farther in the mix.
Nice piece of writing. As far as synths, I've never heard Wilco use the same sound twice - and they often bypass synths for more esoteric choices, like reed organs (which would be VERY cool on this song, BTW).
Thanks for sharing, man. I really enjoyed this.
Daf