It would be easy to label Pinhead Gunpowder as a supergroup, considering that the lineup features four players from other well-known bands. There's drummer Aaron Cometbus, formerly of Crimpshrine, Billie Joe of Green Day on guitar/vocals, Bill Schneider from Monsula on bass/vocals, and Mike Kirsch from Fuel on guitar. Not that these guys got together for the intention of making money or to be the ultimate scenester band, but rather to take a break from the main musical projects that occupy most of their time. There's no pressure involved, no regrets, no touring; Pinhead Gunpow...