In my browsing of the internet, I still have yet to find a Devil Summoner FAQ. I have the game, and I was lucky enough to get the guide with it. Despite it being ENTIRELY in Japanese, with the exception of some strange Engrish and the main character yelling FUCK (no kidding kids, there's a picture in the guide) I think I may be able to get a decent walkthrough going. If anyone has info on the translation part of this, with a little bit of work I could even tell people good tips on what some of the menu options are.
If anyone is interested, you will be given credit. I'm just tossing this idea around, though, so I can do the walkthrough part first and translation guide info next.