I saw 2 at toys-r-us last weekend (vancouver), but that's the first and only retail wii sighting I've made since the day they were released. I doubt they lasted to the end of the weekend.
btw, the same TRU was sold out of Wii play - the reason I was actually there. Sold the last copy to the guy in front of me. Picked up 2nd classic controller for some 2 player streetfight fighter action.