This one's for you HD buffs out there. Looks like there's finally a method to easily playback Blu-ray discs on a Mac. That's right, up until this point there's been no real supported way to pop in a Blu-ray disc into a Mac. The software, called "Mac Blu-ray Player" (I know right) will set you back $39.95.
Keep in mind this software still requires a Blu-ray drive, either internal or external. See TUAW's link for recommendations on where to buy your Blu-ray player first.