God, where do I even begin...
1. This thread is so old even I have not looked at this one in a while... and I have read almost everysingle thread on this forum. (prepare to face the necroposting wrath of Zotar

)
2. Grateful Assasin has not had any presence on this forum for ages. He will never see this message.
3. This is a Final Fantasy forum. Although I have a feeling we have more KH players than FF players, so your post may find some interest.
4. Anyone who knows anything about SquareEnix will know that it is virtually impossible to get ahold of these Square officials... and even if you did, they wouldn't care less. They probably get a thousand letters and emails like these a day.
I do sympathize with you my friend, being stuck with nothing but an Xbox is a frightening prospect indeed in my opinion. The Kingdom Hearts series has always been a PlayStation exclusive series (with of course the exception of Chain of Memories). I do not want to burst your bubble, but I think it is HIGHLY unlikely that the next installment of Kingdom Hearts will be on anything other than a Playstation system. Sorry dude.
Unless of course I am mistaken.