Nintendo expected to post operating profit of over $5 billion says Reuters.

[NJ5]

Khuutra said:
Where is all that money even coming from? I wish I could see the breakdown! Or understand it, I suppose.

It's not that hard to visualize where the money is coming from. Divide $5 billion by the number of Wii users plus DS users:

$5 billion / (100.19 + 48.79) million = $33 per user.

Of course, in the beginning of the fiscal year the userbases were smaller:

$5 billion / (68.8 + 23.1) million = $54 per user

So something between $33 and $54 per average Nintendo customer.

These calculations are not perfect but they should help ;)