As for when the DX7 version is completed: It might prove to be very hard – and again it might not. Jim (and possibly others) won't release it until it's done (duh, Calle) so who knows? I'd be very surprised if you managed to squeeze a deadline out of Mr. Sachs on this...
Or Will Ware, Jim's long-time friend and Prolific programmer, who is the one doing the translation.