Once again, like EB's estimated pricing for the PlayStation Vita, EB's guess is most likely as good as ours when it comes to the pricing of the Wii U - particularly as we don't even have a US or Japanese price point at the moment. But EB currently has the Wii U priced at $599 on their online store.
We're inclined to believe that estimate is a tad high. If we had to make an estimate, we'd the Wii U will most likely retail around the $400 mark, despite the fact the console will come packaged with a modified tablet controller. That's just based on precedent and the fact that the tech probably won't be that expensive to produce.
That being said, we probably won't have the official word on pricing for quite some time.