Having trouble keeping track of all the guest stars and new characters on season 2 of "Smash"? So are we. But let's add another name to the ever-growing list. Daphne Rubin-Vega is set to play a Broadway publicist. Rubin-Vega joins her former Rent costar Jesse L. Martin on the musical series, though she will not be singing or share any scenes with Martin. Are you ready for the January comeback?