[grandinferno]

Carrying on the rich hacker tradition of picking up the slack for companies that are unwilling or unable to provide the functionality users need, a team of Wii coders have given the console what Nintendo could not: DVD playback. By installing a small, hidden channel on a system, this package blesses the console with a libdi file (DVD access library), and allows you to watch your favorite videos with the MPlayer application, an open source media player.

The Wii finally gets DVD playback -- no thanks to Nintendo - Engadget

How to guide (and necessary files): http://hackmii.com/2008/08/libdi-and...vdx-installer/