
They were said to be available online through the Nintendo online store and other online retailers, but only on the 19th which is the Wii launch day. Third-party cables will also be available on launch day and at your local store, not just online.
It was said that the Nintendo cable would be available on launch day, however it would be in very little quantities and that more would be available later on, like in December, now isn't that quite too late?!
However some chump at GoNintendo has found the Nintendo Wii component cable on the Nintendo online store.
So get those cables if you want to have the best possible image being displayed on your TV from the Wii, if your TV has a component input, if you don't you can still use the composite cables bundled with the console.
Many thanks to JonLeung and his tip on this valuable piece of news.