I had a look at Haze, it's a pretty sweet looking game - graphically, who knows about gameplay? Now I'm starting to understand why they're not putting it on Wii...not because the game wouldn't work, but because they'd need a second team just to port it. The graphics have to be scaled way back, probably the same for A.I. and possibly physics, plus they have to get the Wii controller to play nice with the game.
This is the new reality for small developers: releasing a game on the Wii is basically releasing it on a totally different platform. EA can afford to release 4 different versions of a game, especially if it's got a big name like Madden or Harry Potter attached to it. That might not make sense for a small developer creating a brand-new franchise. This could have a negative affect on Nintendo, although I think Wii will do fine thanks to its unique merits.