I do I hook up my wii to two tv's at the same time? Both standard def televisions... thank you!

You could run your A/V cables to a A/V to coax box, and then in return use a splitter to send it to both tv's. Radioshack has A/V "Y" splitters.

How about to 4 or 12 TV's?:

HomeTech Solutions: Composite Video Splitters (http://www.hometech.com/hts/products/video/splitters/composite/index.html)

Definitely. If you plan on going with more than two with a composite video, then the signal may become too weak, it'd be a good idea to use the item Stratmando suggested.