"The dream of the '90s is alive in Portland," the place where young people go to retire. Or so goes the opening musical sequence of Portlandia, the new sketch comedy of Fred Armisen and Sleater-Kinney, aka ThunderAnt. After they put away the flannel, piercings, and surprising flash of leather, you should recognize Portlandia's main theme song: Using South Carolina "chillwave"-r ...