Much in the same way you guys released an official FFXIV USB gamepad when the PC version launched, why not release an official PS3 compatible bluetooth keyboard & mouse combo to coincide with the PS3 release? I'm sure there's gonna be a lot of people who are gonna want to play with a keyboard and mouse, even on the PS3.
My setup in my apartment has a long HDMI cable going from my PC in my bedroom to the A/V receiver in my living room, so I can play PC games on my big TV with surround sound. I use a bluetooth keyboard and mouse (plus a wireless XBox 360 controller) to use the PC from my couch. It's awesome, and I think there would be a market for this on the PS3.