Not sure I'd be PO'd, I'd be a little upset. I've pre-ordered and my delivery date is set for the 24th. I have everything that I need, card charged, email, confirmation number. I'm trusting you Apple, I'm even probably taking the day off work.
Like I said I probably won't. The anticipation is killing me though, this 3G is hard to use after using a 3GS for a few months. I've been waiting for this thing for almost 4 months.