1.8m a month is not enough to satisfy existing demand, even in the slower months. Add WiiFit, SSBB, Mario Kart, Etc., etc. Wii will stay constantly sold out everywhere.
No one has seen the power this system has. And by that, I mean selling power. I know a lot of people who want a Wii but aren't about to go line up at 6:30am to get one. Once Wii are finally on store shelves for more than an hour or two, then regular people, not just gamers, will start getting it too. Much like the DS is mainstream in Japan, heading that way in Europe and starting to gain mainstream attraction in NA, Wii will too, except faster (as supply allows).
China/Korea/India, etc... Nintendo will need to increase production a lot more to supply them as well.







