Hey folks, my component cables arrived today. Here's a description of my setup:
Display: Dell 2005FPW (20inch LCD, VGA/DVI/SVideo/Composite)
Transcoder: Mayflash YPbPr to RGBHV VGA Box
First things first, the Wii will default to 480i output over the component cables when you first plug them in. This means that if your display does not handle 480i over component inputs, which is a problem with my combination of transcoder and monitor, you'll need to do the shuffle with the plugs in the back of the Wii. Here's the trick that I did:
Hook up the Wii using composite cables. Go to the Wii settings menu where you can select 480p, you'll notice it's grayed out. Now, find a friend, significant other, or whipping boy, and have them change the cables to the component while you keep your remote pointed at the 480p box. When it's plugged in, click to change, then move the Wii remote wildly in hopes of finding the confirm button. The tactile feedback helps here, but you certainly need a steady arm for this.
Voila, you should have your Wii in 480p mode.
From what I've read, most Wii games support 480p mode, although I think I remember seeing something that say [URL="http://wii.ign.com/articles/746/746378p2.html"]Rayman Raving Rabbids did not[ support 480p/URL]. So almost anything that is Wii, you should get 480p no problem. Likewise, Gamecube 480p games will output in 480p. It will switch to 480i for a second, then switch back to 480p. Give it a moment and you should be fine. I tested that with Windwalker, Metroid Prime, and Need for Speed Underground.
Now the bad stuff, games which were not progressive scan compatible will not be 480p. This means no 480p Super Smash Bros. Thus, if you want to play Super Smash Bros, you'll need to change the cables and reboot your Wii. Annoying.
However, do not despair, there is still hope. According to some fairly reliable information the composite output is NOT disabled when running in 480i. This means it is possible to create a hybrid cable, as documented at this site.
Anyway, now I've got a nice project for this weekend. I just need to crack open my official component cable, chop up a composite cable wire it in and put in a switch. I'll post pictures and a writeup when I'm done.