Sega announced today that Phantasy Star Universe will be released on Xbox 360 this autumn along with previously announced PlayStation 2 and PC versions.
PSU consists of a single-player adventure spanning multiple planets and Xbox Live-based multiplay. Sega implied that 360-version will be the prettiest.
PSU on Live will allow you to make a squad of up-to-six, and enter worlds where hundreds of other players are playing. Previous Phantasy Star Online games were limited to groups of four on closed doors.
Without a doubt we will hear more about PSU at E3 next month.