Until now nobody could run an application on the Wii without it being approved by Nintendo. This means that the application had to be signed with Nintendo’s encryption key. At the Chaos Computer Club Congress, some hackers explain how they were able to hack the Wii and run their own code, obviously not approved by Nintendo.
As the Gamecube was already hacked, and the Wii is an upgraded Gamecube, they were able to run application on the GC emulation layer, but not access the Wii specific memory, game controller etc. With a hardware hack they could access the whole Wii memory, and they found the encryption key!
Homebrew VR on the Wii anyone? 😉
Here’s the video explaining all that. Hang on tight ..http://youtube.com/watch?v=H5YB1Mmx7E4