Checkpoint acquired a company called PointSec a while ago. This company made full hard disk encryption software for Windows. Now, Checkpoint has released a hard disk encryption version for the Mac. I guess they are taking OSX seriously.
Disk encryption is available today for the Mac (TrueCrypt, PGP), but these aren't able to encrypt the boot partition. Only partitions are by the use of containers. This type of software was available to Windows only primarily.
Now that the 'trick' has been done, I guess more will follow.
I do wonder if it's still possible to use SuperDuper for cloning a bootdisk....