A bit late, though better late than never i suppose, but recently i acquired the preorder bonuses from the KOFXII Japanese version. My friend actually got these for me from the Japanese Yahoo Auction quite a while ago, but since he was bound to come back to the UK at some point i thought it'd make more sense to just wait for him to bring it back with him.
The contents of the auction he won included a CD, mouse mat (Sticker?), and a KOFXII Weiβ Schwarz card.
As far as i know the main preorder gift was only the CD, and not all retailers included the mouse mat. As for the card i have no idea whether it was a preorder gift or just added by the seller.
The CD is actually not what i expected, for some reason (and what probably would make sense) i assumed it would be the OST soundtrack for KOFXII. However the tracks included on this CD are just the opening (attract/demo sound), and the character select tracks for each KOF up to XII.
Fairly dissapointing to say the least...
The Mouse mat i have yet to actually open, i assume it is actually a sticker because of how thin it is, and i'm guessing (with my limited Japanese reading ability) it says mouse mat sticker.
The Weiβ Schwarz card i've not been able to find much information about, as far as i know it is some sort of card battle game (i assume something along the lines of YuGiOh), which spans over a range of different game/anime IPs.
You can check out the official site of it here.
Let's hope that there will be some good stuff given away for the preorder of XIII.