What I'm reading from various boards is that Atlus shipped the game to retailers; some will get it tomorrow, but other's won't have it until the 14th. Someone on Gamefaqs (so it's not the most reliable of sources!) said that EBgames.com told him the stores may get the game tomorrow, but they won't have it available for shipping online until thursday.
Mushashi Wins!, the new PS2 isn't supposedt be out until Friday.