Bought it today, factory sealed at Gamestop, without a pre-order. It looked like they had about a dozen copies behind the counter.
I was going to hold out and buy directly from Nintendo (to send my "message" about how I choose to buy my games), but I got weak, and was able to actually have it in my hands.
On the plus side, I also snagged a "like new" copy of "Mega Man Anniversary Collection" for Gamecube--turns out the cashier had actually traded it in from his own personal collection.