If you are curious about the Final Fantasy Online system requirements then the Square Enix chaps over in Japan have revealed the system requirements for their alpha version on the PC.

Intel Core 2 Duo (2.4 GHz)
AMD Athlon X2 (2.4 GHz)

1.5GB using XP operating system
2GB using Vista or Windows 7 Operating System

NVIDIA® GeForce 8800 or higher VRAM 512 MB
Radeon HD 2900 or higher VRAM 512 MB

Hard Drive
10 GB for installing
10 GB on drive containing the My Documents folder for downloading

Sound - DirectSound compatible (DirectX 9.0)

Internet - Constant broadband connection

Monitor Resolution - 1280 x 720 (32 bit color)

DirectX - DirectX 9.0c

Other Mouse, Keyboard, Gamepad

All these details may change so remember to pop back over the coming months