Plot: "Portlandia" coming in January on IFC features [Fred] Armisen, [Carrie] Brownstein and guest stars satirizing such alternative-culture types as the owners of a feminist book store, a bike messenger, a punk-rock couple, and an arty duo obsessed with putting little cut-outs of birds on anything they lay their hands on. Each half-hour episode will consist of interwoven short films, with some characters recurring from week-to-week.