Also, I clearly need to know who sings "Traveling Riverside Blues", god I hope it was someone old school...

Oh, it was :D Robert Johnson (yeah, that Robert Johnson from "Crossroads Blues"!) wrote the original lyrics; it's been covered by Led Zeppelin and Eric Clapton. I have the Clapton version, but I'm pretty sure I have the original Robert Johnson recording on my HD somewhere.

Also: YAY CHUCK!!!!! He's so awesome. "I am the Prophet Chuck!" And Castiel, oh, he needs hugs :D