Kotaku's posted up sales targets WiiWare developers apparently have to reach before they see any revenue at all.
And they are:
If game is over 16MB - 6,000 units
If game is under 16MB - 4,000 units
If game is over 16MB - 3,000 units
If game is under 16MB - 2,000 units
Once devs break through these barriers, they receive 65 percent of revenue.
Gama learned of the practice of setting limits on WiiWare titles last week.