I'd love to see Call of Duty on the Wii.
I got a Wii about 2 weeks ago. It rocks - totally. The Wiimote/Nunchuck combo offers a totally new gaming feeling.
But... CoD3 sucks!!! The GFX look bad (even if NOT compared to the 360/PS3 version), the controls only work so-so, voice-over is bad (oh, well in the german version at least). The Wii wasn't made for graphic intensive games. The crazy, innovative stuff is where it shines! That's why I got it. And Madden NFL 2007 is great - the free-motion control actually WORK!!! (and offer so much more immersion)
Watching out for a cheap 360 on ebay. Some nice eye-candy action games out. Really would love to get RS6: Vegas or Chrome Hounds for that matter!