You will need to first prepare your PC and phone for the process by installing the Samsung USB drivers and downloading a few files. You will then flash a special Kernel that removes the "Root Block". Lastly you will Root your device. There is a disclaimer attached to the guide.
If you can wait a few more days @DjBliss will be releasing his method for unlocking the bootloader. Once that is accomplished you should be able to easily flash a custom recovery, and then install superuser.zip. That would be a cleaner way with minimized risk.Warning, this method will leave you with a miss matched kernel/modules. This may cause problems unless corrected.
Guide here via XDA