What are your favorite online games for Wii console?

I know a few are Mario kart, Super Smash Bros, Tiger woods but I need a few others that are very fun to play online. Are there any games like mario party that are online? List your favs!|||Animal Crossing: City Folk|||Call of Duty World at War is the best by far.....i recommend you break your piggy bank , hop on your bike, and buy it !!!!!! DO IT....