Looks like the M340i's are starting to slowly arrive stateside. Here is a dealer who has already posted a walk-around, although the vehicle is still in transport mode. It's also in Dravit Grey.
One thing I've noticed is there is no "M" logo below the shifting column like the configurator seems to indicate there is.
Does anyone know about this? I was hoping there would be a little more interior distinction from the non-M Performance models.