I was one of the few in my area to preorder a Wii and pick one up on launch day. I have to say, the technology in this thing is pretty impressive, the controller's pretty fun and innovative, Call of Duty 3 is pretty good, as is Twilight Princess... you can punch in CoD3 by just moving the controller forward instead of using a button, the same goes for reloading, switching guns, etc. When you drive something, you use the Wiimote and Nunchuk as a steering wheel, etc. which was more fun that using a stupid thumbstick.
I'll probably comment more later, but I'm getting kinda tired at the moment...
Edit: This should keep all interested parties occupied for some time:
http://en.wikipedia.org/wiki/Wii