I just got this yesterday...

"Hello George,

Thanks for your interest in pre-ordering Fragile Dreams, pre-orders are absolutely essential to smaller publishers like us to make sure that retailers stock our games. Yes, we do plan on announcing a pre-order bonus shortly, and I can assure you that GameStop/EB will carry that pre-order bonus, though other retailers are still unconfirmed at this point.

I would suggest to go ahead and pre-order from GameStop/EB to ensure that you get the bonus, and when we formally announce the partcipating retailers later to feel free to change it at that time if you wish.

Appreciate your support.

Ken @ XSEED Games'

So, yeah... Preorder Bonus Confirmed, no word on what it is yet, but I hope it's good because preordering from Gamestop cost me $53.08, whereas Amazon would've only cost me $46.99.
Judging by that e-mail, I think it's safe to assume that the Preorder Bonus is most likely a Gamestop/EB Exclusive. (If not, I'm canceling my GS Preorder and going with Amazon)

Begin Speculation...

Never heard of the game

Neat. I hope it isn't awesome, because I probably won't be able to get it on release...I'm going to use the last of my Christmas money on No More Heroes 2. But, I'll probably have cash by the time Fragile comes out. Maybe.