Jackson, Noah and Joel
Here are the band members, I took their job descriptions right from the CD and their Myspace page...
Johnny Clay: Vocals, Guitars, Pianos, Melodica, Glock and everything else
Jake Rahner: Drums, Vocals, Percussion, Stomping, Taco Bell
Pierre Kaiser: Guitars, Vocals, Moog, Foghorn Tape Loops, Tornado Noises
Ehren Ebbage: Lap Steel, Acoustic Guitar, Vocals, Long Walks on The Beach
Ryan Johnston: Bass, Vocals, Synths, Static, Dancing
About 45 seconds of the last song, there were a lot of people in the crowd singing along too.