i had the exact same leak as the op. water would piss in at the exact same point where the pillar met the roof on both the driver and passenger sides. dealer gave me the same run around regarding touch-less car washes. i actually started a thread regarding the issue when i first received my car last february:
http://www.e90post.com/forums/showthread.php?t=114366
after complaining several times over the course of this year... they finally took another look at it and installed some sort of spacers to help tighten the seal at the front. now, instead of pissing into my car... it only drips a bit... which doesn't bother me as much. i'll scan the repair sheet and post it up for you when i get home. i feel your pain though... at least u're in the carolina's.. i had to endure that crap during the winter up here in toronto.
one thing i found though... the rear portion of the roof now rattles when i go over bumps. i've been meaning to report it and bring it in to see if anything can be done, but just haven't had the time to do so.