I've never used Gamecube Linux - but you can run it on Wii and play DVDs. Also, if you use it on Gamecube, you can rip DVDs and use many many passes to reencode the video, as well as get rid of the 5.1 soundtrack, or reencode it to stereo and get the movie down to 1.5GB, mainly just to be able to say you did it. It's not necessary to do this on the Wii, since even in "Gamecube mode" the Wii can read the full capacity of a DVD/DVD9.