I was just looking to see if anybody knew any good websites that work on the wii internet channel?
This one works for The Wii Internet Channel. As a matter of fact you can only access it on the Wii Internet Channel.
How about http://www.soundrocka.com its a free music site, works perfectly on the wii !
YouTubeXL works great for watching videos I did a MakeUseOf post on this last year over here http://www.makeuseof.com/tag/youtube-xl-supersizes-youtube-for-your-tv/
And also take a look at these lists: http://bit.ly/9csilW and http://bit.ly/TfK5V
Not sure if this is what you had in mind but FineTune has an Internet Radio player that works on the Wii: http://www.finetune.com/wii/player.php