Indeed, they didn't know about it at the local one here, either. I have yet to find a confirmed Canadian retailer. I'm going to keep harrassing Toys R Us, though, as even though the guys there the other day didn't know about it, it's pretty likely that they'll end up having it.
The odd one is that Future Shop doesn't have it in it's system. I have no idea what they're normally like for console games, but they generally have other things in their catalogue before they're released with a projected release date.