I feel dirty for linking MadCatz right now. I've hooked my Wii up with them, and there's fugly interference or something creating randomly displayed, static-like horizontal lines. There's a possibility that my Wii is funky since I don't have my official cables yet, so I'm reserving final judgement. I know my new display is fine, since it had no problems with the GameCube component cables.
UPDATE: Oh ho ho, get this: THE RIGHT AUDIO CABLE DOESN'T WORK. In fact, I get a loud buzzing nouse in my right ear. Man, I hope this one is just defective for MadCatz's sake.
UPDATE 2: I'm a moron. Half way into writing negative impressions I realized I must have the Red audio and Red video cable reversed from the symptoms. Hooray for logic. I'm not afraid to show I'm human, so I'm leaving this thread intact in case someone read it before I fixed my own mistake. DUR!