People have had their wiis bricked though the update, and have never hacked at all.
http://techforums.nintendo.com/nins/board/message?board.id=wii_tech&thread.id=29914
If you haven't updated your wii yet, don't!
http://techforums.nintendo.com/nins/board/message?board.id=wii_tech&thread.id=29914
If you haven't updated your wii yet, don't!