A post over on Andriasang details that in the next issue of Famitsu, the Playstation 3 version of BlazBlue: CP is confirmed. Neither a release date nor any word of a X-Box 360 version is mentioned.
Andriasang posted a follow-up to their previous post stating that the Famitsu feature was a full preview for the PS3 version and that as of this time, there is no X-Box 360 version, at least in Japan. It looks like Arc is focusing a lot of time to make sure the net code works right out of the box. Currently the home version is 30% done, but no release date has been decided.
4Gamer attended a localization test for the arcade version and shared a image of what the character select screen looks like in it's current state.
Extended coverage of the event can be viewed on their site.