I'm surprised, I did a search and couldn't find any mention of this game. Such Blasphemy, probably the best use of 2D I've seen in any game, well Little Big Planet is like 2.5D :P. Seriously, PS2 keeps delivering with awesome games.
http://www.youtube.com/watch?v=gI-V3Uw1b3U
Japanese Trailer
http://www.atlus.com/i/v/trailer_revision.swf
US trailer, wish it was better quality
Comes out
May 17 in Japan, and sometime in
Summer for the US. No Europe date announced yet.