Yeah, I heard Konami is interested in getting other studios to produce Silent Hill, and other Konami properties. There's a topic about this here on the forums - Konami Games losses are so bad that they're open to other studios making MGS, Silent Hill Etc. Games
Oh yeah. I don't think he even had anything to do with Team Silent. Kojima didn't get involved until PT came around if I remember correctly. I think there was a time where they had him help with something, but I might be wrong on that.
But yeah, Kojima would be awesome for a Silent Hill game, but I don't see it happening.