The latest UK magazines Official Playstation & Edge have both done feature's on Final Fantasy XIII, and most prominently, the Demo which is due out in Japan on the 16th of this month.
I've scanned both features, but unfortunately it seems the Official Playstation Magazine is missing it's last page, leaving the feature abruptly in the middle of a sentence.
This is most likely down to the page being removed by OPM before shipping, looks like SE may still have aspects on the demo that do not want to be shared with the public.
Irrespective, enjoy both features.
http://finalfantasy-xiii.net/2009/04/06/opm-uk-edge-may-2009-issue-feature-scans.html