Otomate just updated their website for the game. Nothing really all that significant, but it does explain the backlog feature, as well as tell you about the Party Modes Friend Diary (or something).
Maybe someone who's more than half-coherant can translate this.
Click on England's flag.
Edit: Also, they updated the cover for the Limited Edition version, as some of you may know. China's flag I believe...
...I definately tagged this incorrectly. Feel free to fix, mods.