Final Fantasy III DS wi-fi feature revealed: emailing?

ClubSkill.com reports that a leaked screenshot from Jump, a Japanese publication, reveals that Final Fantasy III will make use of the Nintendo Wi-Fi Connection, at least in part, by allowing friends to send 'letters' to each other. Exchanging these emails is said to trigger special events in the game.

Fair enough, but we're still holding out for some true co-op functionality, or even just a simple battle mode. C'mon Square Enix, we play games to take a break from emailing!