Region-free-ify your Mac's DVD drive

Here's a firmware update that can region-free-ify and speed up your Mac's Superdrive DVD drive. Warning: may screw up your computer ferociously. Warning: may violate the DMCA. Warning: It's your goddamned computer, why the hell hasn't Apple given you the capability of watching all your DVDs on it, no matter what country you bought them in? Link (Thanks, Pat!)