From the second page of the same write-up
FinalFantasy.de: There is no version of Final Fantasy XI for the PS3. Are there any plans to develop one? In Europe, there are no HDDs available for the PS2.
A: At the moment, there are no plans to develop a PS3 version. They already have the PS2 game, and they plan to continue supporting the PS2. They don't feel it would be the best use of resources to work on the PS3. Unfortunately, Square Enix is not a hardware manufacturer. They would love to release a HDD, but there is nothing they can do.