Good old Gamefly has BlazBlue: Calamity Trigger in their PSP section. Considering how Gamefly leaked Aksys’ entire lineup in 2007 this is a fairly reliable source. Anyway, it’s unlikely that Aksys would pass on publishing BlazBlue Portable – it’s more of a matter of when than if. The “when” may be this March.
BlazBlue Portable has all twelve playable characters, an ad-hoc mode for versus play, and an all new legion mode where fights are spread on a tactical map.