This was bound to happen someday, too bad Nintendo had nothing to do with it. Seems a group of Wii coders have made an application that allows the Wii to have DVD playback.
The technique installs a tiny, hidden channel on the Wii that features a DVD access library. Then using the MPlayer application, you can watch DVDs on both modded and unmodded Wii consoles.
I do see Nintendo’s point on why they keep pushing back the DVD playing aspect. However, I believe offering a feature and it not being used much outweighs not offering it at all. Those that need their Wii to play DVDs for whatever reason will be happy. Those that don’t need their Wii to play DVDs wont care.