Nintndo gives proof of third party Wii sales.

[LordTheNightKnight]

Let's see what games make up the most of that 30 million.

American totals:
http://vgchartz.com/atotals.php?name=&console=Wii&maker=&boxartz=1

That's likely to exceed 30 million, given this is a few weeks ahead of NPD numbers. But there are still lots of 3rd party games selling a few hundred thousand copies, and since the development costs are lower, that's a better profit margin.

EDIT: For some reason, you need to click the numbers at the top to see the next pages properly.