Devil Summoner: Kuzunoha Raidou vs. The Army of Ultimate Power is apparently on its way to the US later this year.
IUp also has a bit of background on the more controversial elements of the Megaten series in general, which can be found
here, although some of the art (Hellooooo, Mara) is probably not safe for work. (Mara, incidentally, shows up as an optional boss fight in Shin Megami Tensei: Nocturne, albeit as something of a shadow of his former, um, glory, thanks to a summoning gone awry.) For anyone who might be interested, Hardcore Gaming 101 has a more detailed overview of the series, including Devil Summoner: Kuzunoha Raidou, which is on page 6,
here (note: spoilers abound for most of the games, and the site is fairly graphics-heavy). Evidently one of your companions in Kuzunoha Raidou is a talking cat...?
Now hopefully there will be good news about Persona 3...