The 2.4Ghz module/RX is in the works but I cannot comment as to exactly when it will be available; we are getting close but you never know in this business when the monkey wrench may come flying in!
Yes, it will fit all existing Hitec (and Futaba) transmitters that use the current module. All channels up to 9 will be available.
Sorry, I really can't make any more comments at this time so no probing please.
Mike.