I've noticed some graphic noise during a number of Wii games. A bit in Wii Fit, New Super Mario Bros., and most recently Skyward Sword. I don't play often enough to bother me but the amount of time I've sunk in to Zelda has prompted me to ask the collective Internet.
I have this Wii hooked up via component cable. I had the Wii repaired / replaced by Nintendo a few years ago and, honestly, I can't remember if this problem popped up when I got the new console or if this started later.
It almost seems like certain rendering cases cause it. With Zelda for instance, it's much more prominent when I'm in the clouds. Wii Fit, on the main menu. Mario, I remember this showing up during levels only.
Anyone else seeing this?