Playoff time.
My guesses for the starting XI's straight from the SBnation Soccer article:
Colorado Rapids (4-4-2): FW: Casey, Cummings; MD: Jamie Smith, Jeff Larentowicz, Mastroeni, Mullan; DF: Rodney Wallace, Moor, Wynne, Kosuke Kimura; GK: Pickens.
Columbus Crew (4-4-1-1): FW: Schelloto, Lenhart; MD: Rogers, Adam Moffat, Brian Carroll, Eddie Gaven; DF: Shaun Francis, Iro, Marshall, Frankie Hejduk; GK: Gruenebaum.