Word to the wise: It looks like if you update your Wii, the Twilight Princess save data will be deleted if it corrupted by the well-known exploit. A new update to the Wii system will "check for and automatically remove such save files" that are unauthorized save files. So, it looks like those who wish to update their Wii system will no longer be able to take advantage of the notorious Twilight Princess hack in the future.

Full story: n4g.com