Looks like Catherine is going to be a few months shy of its "winter 2010" target. Atlus announced February 17 as the game’s release date, so there’s plenty of time for the publisher to better explain how Catherine plays.
The story involves Vincent, an ambitionless salaryman (called a "herbivore" in Japanese slang) who is dating Katherine with a K. After a one night stand with Catherine, Vincent begins to have nightmares with giant sheep and heart monsters. Vincent’s first appearance in the Megaten–verse was actually in Shin Megami Tensei: Persona 3 Portable.
Catherine is being developed by the Persona team and unlike other Atlus titles, Catherine is a multiplatform game for PlayStation 3 and Xbox 360.