Nuvalo has released Bootit for the Nintendo Wii

Boot it is a Linux loader designed for use with disc images placed on an SD card or USB Device. It bypasses the need for partitioning by allowing the user to run a disc image in almost exactly the same way as one would run a Linux live CD, with the notable exception that the user can actually make changes to the "disc" during their Linux session. It can also boot normal Linux partitions.

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