"PS3 exclusives mean no Wii release, which would be the dumbest move ever..."
The problem with the Wii is that it has the processing power of a toaster oven. You can port games between 360 and PS3 like you want. But there are almost no (good) games that are multiplatform Wii/PS3/360, because you would have to go after the lowest common denominator. So at the moment developers target different games for Wii and PS3/360.
(Edit: Disclaimer: And yes the Wii kicks the other two consoles anyway.)