i called yesterday about getting mine replaced. talking to the rep on the phone the units that they are sending us the case that holds the components is used and refurbished but the internals are new. i have my suspicions as to what all is new, i would be willing to wager a good ammount of money that they are reusing as much of the old components as possible to cut costs. with this you may as well consider this a used refurbised phone. im OK with this as long as the replacement works like it is supposed to without problems (outside of OS bugs) and it doesn't look like it's been drug by a chain down the road.
the rep mentioned that the used case is what prevents them as selling it as a new phone.