Due on US shelves April 25th later it seems for European release (typical)
although judging from the number of "music videos" on google it's seems a number of Europeans have managed to "purchase" a copy already.
Special edition details
Japanese Site: standard content, a new twist on character profiles
English Site: better wallpaper (slow loading)
Fan Wallpaper from adventchildren.net 314 of them
elderly tags Final Fantasy VII Advent Children DVD Movie Film website wallpaper special edition