Yeah, it why I bought a cheap second hand gen-1 wii, homebrew hacked it, and used gxloader to rip all of my discs which are now in the loft. I'm still looking for a solution to rip my Dreamcast games though.
Although I do wish I could chop the garbage off the end of my gamecube isos to make them similarly sized to the isos you can download if your so inclined. Ones you make yourself are always the full size of the disc, meaning I can only fit so many on the 32GB uSD card currently in an adaptor into the USB port of my Wii.