Confirmed 5 September 2008 for PAL regions. Cant wait!
http://www.gamesindustry.biz/articles/infinite-undiscovery-rpg-from-the-star-ocean-team-set-for-a-september-5th-release-in-pal-regions
– Square Enix Ltd., the publisher of Square Enix® interactive entertainment products in Europe and other PAL territories, today announces that INFINITE UNDISCOVERY™ will be released across all PAL territories on 5th September 2008, exclusively on the Microsoft Xbox 360™ system.
The game will be released simultaneously worldwide, with the North American version shipping from 2nd September and available across the rest of Europe and other PAL territories on 5th September.