Depending on what you download, you might have quite a few channels on your Wii. Aside from the Disc, Mii, Wii Shop, Photo, Weather, and News channels (which can't be deleted), you might also have the Nintendo, Check Mii Out, and Everybody Votes channels hanging around on your menus.
Then, there's the Internet Channel, not to mention whatever VC or WiiWare titles you've downloaded. Some games even have their own channels, like Mario Kart and Wii Fit. Then, it's possible you have some unofficial ones lying around, too.
How many channels do you have on your Wii? Which ones do you utilize the most, and which do you utilize the least? Are there any channels you wish to see from Nintendo in the future?