I managed to brick my Wind today ( OS X 10.5.6 ). I installed Chameleon 2 played around with it for a bit, worked out that I could not return from hibernate and then tried to install the V9 EFI bootloader over the top and then hats where all my trouble started. The machine would boot and then just turn off.
Lucky I had a full drive backup and it was relatively painless to get back, but DO NOT install this unless you are sure you want it at the moment - you CANT uninstall.
Moderator Edit: Triplicate topics merged.