8:15pm in Australia, not going to midnight launch because I didn't pre-order (I'm pretty sure you need to have?). Will pick it up early in the morning.
Never been to one myself, but yes, I'd imagine you'd need to pre-order it like I have. Though saying that, it could be quite location dependent. The game shop I'll be picking mine up from is in a fairly small town area in comparison to a lot of bigger city shops, so I'd expect some people will be able to pick up a copy there without pre-ordering.
I accidentally ordered a copy of MW3 on Amazon months ago, but forgot to cancel the order, and it's just arrived a day early haha! About to play some now. Still might go to midnight launch tonight with my friend, purely for the experience.