Ohhhhh, this is exciting. The fact that this game is coming to the Wii only of the next gen consoles is a great indication that Wii really is going to shed the Nintendo is for kids image.
Or they could just be making it for the Wii because it's a lot easier to put a cheap port on it than the other next gen consoles. Eh, no, I think I'll remain optimistic about this.

Just two things:
1) Nothing about this game better be Nintendo Censored. If Nintendo really wants to shed that kiddie image, the game better be as it is on the PS2 in terms of gore and story.
2) I know the PS2 is still really hot right now, and as such this game is going to most likely be developed from the ground up with the PS2's hardware in mind and then "ported" in a sense to the Wii. However, with that said, I really hope the take advantage of the Wii's power and controller and make the Wii version
at least look noticeably better and run smoother and more innovative. Because, as nice as it is that the Wii is getting a game so full of gore as Manhunt, it's still not going to be a good look if both games get released at the same time and the Wii version looks no better than the PS2 version with the wiimote tacked on.