Some of the Atlus employees really enjoyed bringing the first game to the U.S. Normally I am against saying send a bunch of e-mails to a company, but in this case if you show demand for the title, they might just make a push to put it on the publishing list. So send some e-mails to them saying you would like to see Arcana Heart 2 in America.
PSN: SilentNova XBox Live:SilentNova777 Wii:7762-0631-5048-5334 Tatsunoko vs. Capcom:2450-6027-0846/S.Nova
There was already a request thread for this game on the Atlus forum:
But it doesn't seem like they got anywhere. And now that the life of the PS2 is finally drawing close to an end, I doubt we'll ever see it happen, since most companies apparently are already not working on PS2 anymore. So yeah, it's unfortunate, but can't be helped.
We can always still import a Japanese copy, though.