I abandoned the piano accompaniment work and am writing cello piece to go along with it instead. Piano was too choppy and just as lost as the guitar. It needs a basic, deep, woody sound to back it all up. I've never recorder a cello before, but I'll experiment until I get a good sound.
I'll probably re-post sometime in 2009 when I'm done... Just kidding, maybe in Feb depending on how it all sounds when it's mixed. I am also considering a harmonica solo - I think it could be cool but we'll see.