I'm definitely game for it, mainly because that list of films (The Grudge being my favorite) boasts quite a few that I really enjoyed. So I know they are capable of at least making a decent film from an original. Good or bad? I think it could be really good, but who knows. The only thing that kinda irks me is the writing team they have. Who immediately thinks of Japanese horror/weird/shinigami stuff when they think of CW? Pulling writers who are working on that network for a project like this is rather odd to me, but.....who knows? Could be a good move. I'll definitely see it, if it ends up being made. There's no question there.
*Oh yeah, and as for casting, there is someone in my head who I saw recently in a movie trailer and thought, "they would make a perfect Light/Kira!", and now I can't for the life of me remember who they were. But, besides that person, I would totally case "Peter" from Narnia as Light. He looks just like him, an english version anyway.