Charlie Haden & Pat Metheny

I've been watching Spectacle, Elvis Costello's new talk/music program on Sundance Channel over the last few weeks and while I'm a big fan of Elvis's music, I'm less certain of his future as an interviewer.  I was blown away by this performance by Pat Metheny and Charlie Haden a couple weeks ago though.  I didn't know the song before I saw them play it here and I was kind of entranced when I heard it.  I hope you like it as much as I do.