Can anyone tell me MORE about upcoming TERMINATOR 4 movie?

I heard terminator 4 is in production and the movie title is TERMINATOR SALVATION: THE FUTURE BEGIN. I also heard that CHRISTIAN BALE will act as JOHN CONNOR. I wanna know when is the release date of the movie and who will replace arnold?I wanna know evvvvvryyyythiiing about the movie!I'm a die hard fan of terminator. Can anybody answer my question.PLEEEASE....