Yeah this is really bad and unexpected. It just feels so rushed....and unorganized. Plus I kinda liked checking out the new features of the machine at the Apple Store where I could get immediate help with a $1400 device if there happens to be a problem.
While I have no interest in buy a uni-port notebook (no matter how thin), the only reason I can see that Apple released it before there was sufficient stock (if that is really the issue), was that they were unsure about releasing a uni-port model and are taking a "careful" approach by letting a few dribble out and see what happens.