I saw this cool new channel for the Wii only available in Japan. It's called Everybody's Nintendo. I believe it gives you information about upcoming Wii and DS games. The cool thing about it is that you can download Nintendo DS demos from the Wii with this new channel. There's more to it, but I'm not good at explaining stuff. It looks cool, and you can find more details about it here: http://www.nintendowiifanboy.com/2007/11/27/everybodys-nintendo-channel-videos/
Its called Nintendo Channel in america. It came and went because nintendo shut down Nintendo Wi-Fi connection. If you're still lucky enough to have it it still won't work