http://www.gamespot.com/news/2005/05...s_6124746.html
The biggest story of the press conference surprised many attendees at the Shrine Auditorium. Microsoft announced that Square Enix, a longtime partner with Microsoft rivals Nintendo and Sony, will be bringing Final Fantasy XI to the Xbox 360 and Xbox Live.
So, Squenix finally heads towards the world of Microsoft. Thoughts?

EDIT: Please note that this thread is for discussing the Square Enix / Microsoft side of things, not the Final Fantasy XI side of things. If you want to discuss Final Fantasy XI being released on the X-Box 360, there's a thread I've made in the Final Fantasy XI forum for that. Thanks.