Square's profits haven't been fantastic lately, and there is no doubt that the game will make much more profit being on the 360 and the PS3, than just the PS3 alone.
I think it would be more fairly assume that Sony didn't pay them at all, rather than Microsoft having bribed them. If Sony didn't pay for exclusivity, then why should Square-Enix give them their biggest game as an exclusive, when they can make much more profit porting it to a console with a larger userbase in the US?
Especially when that new console is notorious for selling 3rd party games very well.
I don't need your console war.
It feeds the rich while it buries the poor.
You're power hungry, spinnin' stories, and bein' graphics whores.
I don't need your console war.
NO NO, NO NO NO.