If my earlier calculations are correct, the Wii is on aim to make it. 8 Weeks and 520K is about 65K/Week, which is about 10K/week less than in Feb. Looks like it has a change!
http://www.vgchartz.com/games/userreviewdisp.php?id=261
That is VGChartz LONGEST review. And it's NOT Cute Kitten DS