It is essential that you get your Wii hooked up to the internet. From downloading games to messaging friends and even checking the latest news and weather, there's plenty of stuff to do once your Wii is online. Yet the one thing you don't want to miss out on is online gaming. You can play some of the best Wii games online and it's great fun giving your friends a beating in games such as Mario Kart Wii or FIFA 09. Want to know which Wii games you should buy to play online? Read on.