The  sims for the wii has been called MySims check out

http://www.nintendowiifanboy.com/2007/02/16/new-my-sims-wii-details-emerge/

According to wiifanboy mii's will not be used in the game.  Here are some details (countesy of wii fanboy) :


As for these new details, they include:

A total of 80 characters will be available to the Wii version of the game
The game starts in a pretty crummy town, where upon fixing it up, you'll attract more residents
All of the usual character customization returns: clothes, facial features, etc.
The game emphasizes relationships and charges the player with constantly maintaining them
Players may create their own furniture, houses and accessories through a block-building system
There's a volcano

yeh the 'incinerator' trick rock's.  How u tried drowning them make a swimming pool and put walls all the way around it.

dude, i can't wait 4 this game!
but i think it will b gay if u cant use ur Miis in it!  it's a perfect game 4 Miis!