Forgive me if it's been mentioned here before (I rarely venture into these forums myself) but I thought y'all should know this. My roommate just managed to snag a copy of Wrath of the Lich King from (as the title states) our local 7-11 convenience store. Apparently they have no real concept of release dates and the boxes have been shipped to them, so if you want to have a bit of hassle now but avoid midnight launches (and get another three hours of gaming in if you're on the west coast) you might want to check that out.
Apparently it installs just fine right now, and you can still play WoW using that client, you just have to wait for midnight Eastern time to activate it.
If you're interested I'd suggest going in the evening, that's generally when the less knowledgeable cashiers are around.
Anyways, have a good one and remember to kiss your family goodbye before activating Wrath.