I've heard of European and Australian prices (of games, consoles, and related things) sometimes being higher than North American prices (after conversion).
Of course, my memory could be wrong, but aren't Japanese prices, after conversion, much closer to American/Canadian prices (at least closer than European and Australian prices are)?
So this may be stating the obvious, but the Japanese price, if revealed before the North American price, would lead us to some very close estimates.
I seem to remember the GameCube was cheaper here in Canada when it first came out (at least in some places), even including the 7% GST at the time. Now our GST is 6%, and the dollar is something like 0.90 US, or at least closer than it was in 2001, so if it turns out to be $149.99 US, for example, they may make it $149.99 Canadian instead of $167.67. Then again they may more likely make it $174.99 Canadian, which would be more...but not by much...but still...