I can't believe I'd ever say this, but I now actually have a Johnny Cash song on my Ipod. He does a cover of "Hurt" by Nine Inch Nails which is just gorgeous and heartbreaking to listen to. I was in tears the first time I heard it. I was never a Johnny Cash fan but this song has given me a whole new respect for his musical talents.
Umm, to keep this thread on topic - a live album I'm planning to buy (based on what I've heard on the radio) is "The Cat Empire Project". Live recordings of The Cat Empire performing with guest artists. What I've heard sounds really good.