In the Wii Shop Channel you will find all other available channels.
Random Fact: In Australia (and probably some other countries), the Check Mii Out Channel is known as the Mii Contest Channel.
From the list you've given, I notice that you are missing the Internet Channel, which basically just lets you browse the net (this channel was originally Free, then became 500 Wii Points, but is now Free again) and the Today and Tomorrow Channel, which is a channel which gives you your horoscope.
However, I am unsure whether the Today and Tomorrow Channel is available in your location. Wikipedia states that it has only come out in Japan, Korea, and Europe. However, Wikipedia fails to mention that Australia has it, and I can assure you, we have it here. I mentioned it just in case the USA actually does have it (assuming that's where you're from).
And yes, the homebrew channel exists, but is not a legal channel.