Damn. I am a big Pearl Jam guy, so I know all about Cornell/Soundgarden and how they were all friends. I loved Superunknown back in the day. Also really liked Cornell in Audioslave.
My wife and I went to a Cornell acoustic, solo performance 1 1/2 years ago. It was a great night of music. Played some Soundgarden, Audioslave, Temple of the Dog songs, along with some great covers. He will be missed.