For my last two preorders, ACIII and RE6, I never got a "it's ready for pickup" email. I got the email the evening before with the bar code and just showed that email to the guy at the service desk. The pickup went w/o a hitch. I wouldn't worry about getting an email tonight/tomorrow.
In a worst case scenario, you could just bring in your RZ card and order confirmation and they should be able to find it.
Yes, but you still have to get the e-mail saying "your order will be ready for pickup tomorrow" and none of us got that either. If you don't get the notice, it means they haven't received the inventory at the store and your order hasn't been processed for pickup, at least if you preordered online. They may still have enough copies, but given that many of us want the $20 preorder credit, we aren't looking to mess with things and its possible the online order copies haven't been received at the stores yet, especially if people who preordered online for shipping with express service still haven't seen theirs ship yet. This is very worrying on a number of levels.