This seems to be selling quite better than Pikmin 2, I expect 300,000+ for the first month...
It should match the 250,000 Crystal Chronicles did in February at least, and we are getting closer to the holidays...
still, the Player's Choice versions of Zelda and Mario Sunshine are probably competition for it...
I also expect 100,000+ from Donkey Konga, by all accounts, the game is a word-of-mouth hit...