It's not just PS3 to 360. It looks like this whole exclusivity thing can go the other way, too. The ESRB, always good for spoiling a future press release, lists the heretofore Xbox 360-exclusive action-RPG Eternal Sonata as both an Xbox 360 and PlayStation 3 title. If the ESRB's listing is accurate, it's unknown if Eternal Sonata would be released on the PlayStation 3 in Japan, where it's cited as a particularly strong Xbox 360 offering for the market. The title is scheduled for a June 2007 Japanese release under the title Trusty Bell: Chopin's Dream and a 2007 North American release. We've asked Namco to comment on the ESRB listing.