If Final Fantasy X-2 International+last Mission release in Europe it will pass by the USA before I think.
But I know many fans of Final Fantasy in your countrie(as in Europe) are unhappy to haven't got this game.

For the question:
"how does Square-Enix get the petition, and are they taken seriously?"
the petition was sending by e-mail to their office in Japan and for the other question I can't answer because it depend of SquareEnix and if FFX-2's salls are more or less good

EDIT: Please do not double post. Use edit/delete to add more. -Murder