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?