You can play Saturn games on the computer with GameTap (http://www.gametap.com)
We already have a few Saturn games in our catalog but more are coming every week. Phanzer Dragoon anyone?
http://www.gametap.com/home/play/gameDetails/130001150
PS: Without an harddrive Saturn games will never make it to the Wii. Saturn games are over 600Mb+